Published © Apache-2.0

+550 Cool HumanBody Facts

Get a new astonishing medical fact about how cool the human body is. More than 550 facts are available.

BeginnerFull instructions provided2 hours1,204
+550 Cool HumanBody Facts

Things used in this project

Hardware components

Amazon Echo
Amazon Alexa Amazon Echo

Software apps and online services

Alexa Skills Kit
Amazon Alexa Alexa Skills Kit
AWS Lambda
Amazon Web Services AWS Lambda


Read more


AlexaSkill Code

tutorial PDF



    Copyright 2014-2015, Inc. or its affiliates. All Rights Reserved.

    Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at

    or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

 * This simple sample has no external dependencies or session management, and shows the most basic
 * example of how to create a Lambda function for handling Alexa Skill requests.
 * Examples:
 * One-shot model:
 *  User: "Alexa, ask Cool Human Body Facts for a CoolHuman fact"
 *  Alexa: "Here's your CoolHuman fact: ..."

 * App ID for the skill
var APP_ID = ''; //replace with "[your-unique-value-here]";

 * Array containing CoolHuman facts.
var CoolHuman_facts = [
    "1 in 10,000 people have their internal organs reversed or 'mirrored' from their normal positions.",
"10% of human dry weight comes from bacteria.",
"10% of men and 8% of women are left-handed.",
"80 head hairs are likely to fall every day.",
"80% of the brain is water.",
"Diabetes causes 6 deaths every minute and 1 in 20 deaths in the world. Every year 3.2 million people in the world die from diabetes or related causes.",
"Body fat is not particularly hazardous to health until the level of total body fat reaches 35% for men and 40% for women.",
"Eating Breakfast helps to burn 5 to 20% of calories throughout the day.",
"A red blood cell can circumnavigate your body in under 20 seconds.",
"A baby is born without kneecaps. They appear between age 2 and 6.",
"A baby's head is one-quarter of it's total length, but by age 25 will only be one-eighth of its total length.",
"A childs ability to learn can increase or decrease by 25% or more depending on if the child grows up in a stimulating environment.",
"A condition called synesthesia can cause senses to overlap. In other words, some people can taste words or hear colors.",
"A drop of blood contains 250 million cells.",
"A fetus acquires fingerprints at the age of three months.",
"A full bladder is roughly the size of a soft ball.",
"A hair grows by 0.3 to 0.5 mm per day, 1 to 1.5 cm per month and 12 to 15 cm per year.",
"A hard working adult sweats up to 4 gallons per day.",
"A healthy liver processes 720 liters of blood per day.",
"A heartbeat is the sound produced by the closure of valves of the heart when the blood is pushed through its chamber.",
"A human being can look forward to having sex an average of 2,580 times with five different partners.",
"A human body contains about 200,000 temperature detectors.",
"A human body has 500,000 touch detectors.",
"A human ear contains about 24,000 fibers in it.",
"A human head remains conscious for about 15 to 20 seconds after it is been decapitated.",
"A human lung contains about 700 million alveoli.",
"A muscle called the diaphragm controls the human breathing process.",
"A neglected child brain can be substantially smaller than that of a healthy child.",
"A New born baby loses about half of its nerve cells before it is born.",
"A newborn baby has more than 26 billion cells.",
"A newborn babys brain grows almost 3 times as fast during the first year of life.",
"A pair of feet have 500,000 sweat glands and can produce more than a pint of sweat a day.",
"A person can expect to breathe in about 45 pounds of dust over his/her lifetime.",
"A person can live without food for about a month, but only a week without water.",
"A person growth like being tall or short is not determined only by the genes. Growth hormone also is responsible for it.",
"A person will die from lack of sleep sooner than they will from starvation, which usually takes a few weeks.",
"A simple, moderately severe sunburn damages the blood vessels extensively.",
"A single hair has the ability to support up to 100 grams of weight and the whole head of hair has the ability to support up to 12 tons of weight.",
"A single human sperm contains the 37.5mb of male DNA required to create a human child. That means an average ejaculation sees the transfer of 1,500 terabytes of information.",
"A sneeze generates a wind of 166 km/hr (100 mi/hr), and a cough moves out at 100 kmh (60 mi/hr).",
"A square inch of skin consists of 1300 nerve cells.",
"A square inch of skin consists of three yards of blood vessel.",
"A womens heart beats faster than a mens.",
"About 10,000 human cells can fit on the head of a pin",
"About 32 million bacteria call every inch of your skin home.",
"About 80% of ultra-violet rays from the sun can get through cloud and cause sunburn even on cloudy days.",
"About 500 million sperm mature every day in a normal male adult.",
"About one third of the human race has 20-20 vision.",
"After death, the body starts to dry out creating an illusion that the nails and hairs are growing even after death.",
"After eating too much, your hearing is less sharp.",
"All the blood in our body passes 400 times through each kidney per day.",
"Almost 90 to 95% of diabetes is of type 2 or maturity onset type; that affects people in their middle age. Type 1 or juvenile diabetes affects 70,000 children under the age of 15 years every year.",
"Americans on the average eat 18 acres of pizza every day.",
"An adult human body contains five to six quarts of blood and an infant has about one quart of blood.",
"An adult is made up of around 7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms.",
"An average adult male brain weighs about 1375 grams.",
"An average capillary is only 1mm.",
"An average human body contains enough amount of fat to make seven bars of soap.",
"An average human drinks about 16,000 gallons of water in a lifetime.",
"An average person has over 1,460 dreams a year which is about 4 dreams every night.",
"An average person laughs about 15 times a day.",
"Any damage to brain cells cannot be repaired completely.",
"Approximately 75% of human waste is made of water.",
"Around 90% of the cells that make humans aren't human in origin. We're mostly fungi and bacteria.",
"Arterial blood contains a lot of oxygen and nutrients for the body whereas venous blood contains low oxygen level and nutrients.",
"As we get older, the brain loses almost one gram per year.",
"Aspirin and alcohol can be absorbed directly into the bloodstream through the stomach lining.",
"Astronauts cannot burp in CoolHuman. There is no gravity to separate liquid from gas in their stomachs.",
"At birth we have over 300 bones. As we grow up, some of the bones begin to fuse together as a result an adult has only 206 bones.",
"At just 12 weeks the human fetus can scowl and squint.",
"Babies are always born with blue eyes.",
"Babies are born with 300 bones, but by adulthood the number is reduced to 206.",
"Babies are born with pink lungs but they darken in color as we breathe in polluted air.",
"Babies are color blind when they are born ,so they only see black and white.",
"Babies are, pound for pound, stronger than an ox.",
"Babies crawl to an average of 200 m a day.",
"Babies recognize sounds while in mothers womb.",
"Babies start dreaming even before they're born.",
"Baby foreskin is often used as a skin graft for burn victims.",
"Banging your head against a wall uses 150 calories an hour.",
"Beards are the fastest growing hairs on the human body. If the average man never trimmed his beard, it would grow to nearly 30 feet long in his lifetime.",
"Before their first birthday, average babies will have dribbled 255 pints of saliva. By the time they're two years old, they will have crawled 93 miles.",
"Blind people understand spoken words quicker than sighted people.",
"Blonds have more hair.",
"Blood is 6 times thicker than water.",
"Bone is stronger than some steel.",
"Bones make up only 14% of our weight.",
"Borborygmi is the noise or sound which our stomach makes when we are hungry.",
"Brushing your teeth regularly has been shown to prevent heart disease.",
"By 60 years of age, 60% of men and 40% of women will snore.",
"By the age of 60, most people will have lost about half their taste buds.",
"By the time a woman has reached her 60's, she will have released around 450 baby making eggs.",
"Capillaries are so small that it takes ten of them to equal the thickness of a human hair.",
"Central obesity or apple shape of the body and insulin resistance is the main reason for diabetes increase in Indians",
"Children grow faster in the springtime.",
"Children have better sense of smell than adults.",
"Children have more sensitive ears than adults.",
"Children lose an average of 90 hairs per day, which increases to 120 by old age.",
"Cold weather improves human memory and concentration.",
"Crying alleviates stress and allows humans to decrease feelings of anger and sadness.",
"Curly hair comes out of an oval follicle.",
"Depending on the area of the human body, the thickness of the skin varies from 1/2 to 6 mm.",
"Diabetes in Asians is five times the rate of the white population",
"Diabetes is a silent epidemic and according to WHO there are 246 million people in the world living with diabetes. This is almost 6% of the world's adult population.",
"Diabetes is the number one cause of kidney failure in the world. Besides this every year it is responsible for 5% or 5 million blindness in adults and one million limb amputations.",
"Drinking coffee prevents Parkinson's disease.",
"During the first six weeks of life, there is no difference between the male and female embryo.",
"During your lifetime, you will produce enough saliva to fill two swimming pools.",
"During your lifetime, you'll eat about 60,000 pounds of food, that's the weight of about 6 elephants!",
"Each lung contains 300-350 million respiratory units called alveoli.",
"Each person sheds 22 kilograms of skin in his or her lifetime.",
"Earwax production is necessary for good ear health.",
"Eighty percent of people infected with the Ebola virus, will die from this disease.",
"Enamel, found on our teeth, is the hardest substance in the human body.",
"Even small noises cause the pupils of the eyes to dilate.",
"Every 60 seconds, your red blood cells do a complete circuit of your body.",
"Every atom in your body is billions of years old. Hydrogen, the most common element in the universe and a major feature of your body, was produced in the big bang 13.7bn years ago.",
"Every day 440 Gallons of blood flows through each kidney.",
"Every day an adult body produces 300 billion new cells.",
"Every day the average person loses 60-100 strands of hair.",
"Every day, your heart creates enough energy to drive a truck for 20 miles.",
"Every hour, the human eye can process 36,000 bits of information.",
"Every human spent about half an hour as a single cell",
"Every minute 30,000 to 40, 000 dead skin cells fall from our body.",
"Every person has a unique tongue print.",
"Every square inch of skin on the human body has about 32 million bacteria on it, fortunately, the vast majority of them are harmless.",
"Every time you lick a stamp, you're consuming 1/10 of a calorie.",
"Every tongue print is unique.",
"Everyone has a completely unique smell (except for twins).",
"Except the heart and lungs, all other parts of the body receive their blood supply from the largest artery of the body, the aorta.",
"Exercise and diet can either reduce or delay the incidence of diabetes by over 50%.",
"Eyes are the only part of the human body that functions at 100 percent ability at any movement.",
"Facial hair grows faster than any other hair on the body.",
"Feet have 500,000 sweat glands and can produce more than a pint of sweat a day.",
"Fidgeting can burn about 350 calories a day.",
"Fingernails contain keratin and they seem to be strongest component in the human body.",
"Fingernails grow fastest on the hand that you write with and on the longest fingers. On average, nails grow about one-tenth of an inch each month.",
"Fingernails grow nearly 4 times faster than toenails.",
"Food is either cooled or warmed to a suitable temperature in the mouth.",
"For every 24 hours, in a healthy adult, more than a gallon of water containing over an ounce of salt is absorbed from the intestine.",
"For every pound of fat gained, you add seven miles of new blood vessels.",
"Frequent dreams are correlated with having a higher IQ.",
"Frequent washing of hair does not cause hair loss.",
"From the age of thirty, humans gradually begin to shrink in size.",
"Glabella is the CoolHuman between your eyebrows.",
"Goose bumps on our skin are caused by pull of muscles attached to hair follicles and make the hair upright.",
"Guys are more likely than girls (by a ratio of 3-to-2) to have bad acne.",
"Hair is the fastest growing tissue in the body, the next being bone marrow.",
"Half a liter of water per day is lost through breathing.",
"Healthy human hair emits sound.",
"Here are a few things you might not have known about all different parts of your anatomy.",
"Hold out your hand and make a fist. If you are a kid, the size of your heart is same as the size of your fist and if you are an adult it is about the same size as twice as your fist.",
"Hugging releases oxytocin, which helps to heal physical wounds, and makes someone trust you more.",
"Human blood is a make up of Red Blood Cells carrying oxygen, White Blood Cells that fight disease, Platelets that help the blood to clot and a liquid called plasma.",
"Human blood is colorless. It is the hemoglobin; a pigment present in the red blood cells is responsible for the red color of the blood.",
"Human bone is as strong as steel but 50 times lighter.",
"Human fingers stretch and bend about 25 million times in a normal lifetime.",
"Human fetuses react to loud rock music by kicking.",
"Human hair is made up of a body protein called keratin and it grows out of an opening of the skin called Follicle.",
"Human hair is virtually indestructible.",
"Human kidneys have about 1 million nephrons that filters out liquids and wastes.",
"Human lips have a reddish color because of the great concentration of tiny capillaries just below the skin.",
"Human skin cells multiply every second to replace the worn ones.",
"Human skin contains 45 miles of nerves.",
"Human skin has a tendency to shed 40 pounds of skin in lifetime.",
"Human speech is produced by the interaction of 72 muscles.",
"Human teeth are almost as hard as rocks.",
"Humans and dolphins are the only species that have sex for pleasure.",
"Humans are bioluminescent and glow in the dark. The light that we emit is 1,000 times weaker than our human eyes are able to pick up.",
"Humans are extremely visual; 90% of the information we gather from our surroundings is from our eyesight.",
"Humans are the best long distance runners on the planet. Better than any four-legged animal.",
"Humans are the only animals to produce emotional tears.",
"Humans are the only mammal that cannot swallow and breathe at the same time.",
"Humans are the only primates that don't have pigment in the palms of their hands.",
"Humans can make do longer without food than sleep.",
"Humans have 46 chromosomes, peas have 14 and crayfish have 200.",
"Humans have more facial muscles than any other animal on earth - 22 on each side of the face.",
"Humans have the ability to differentiate about 10,000 odors.",
"Humans share 50% of their DNA with bananas.",
"Humans shed about 600,000 particles of skin every hour - about 1.5 pounds a year. By 70 years of age, an average person will have lost 105 pounds of skin.",
"Humans shed and regrow outer skin cells about every 27 days.",
"Identical twins have identical DNA but not identical fingerprints.",
"If Barbie were life-size, her measurements would be 39-23-33.",
"If human sense of smell is affected, sense of taste is also affected as the brain interprets signals from the nose and tongue.",
"If saliva cannot dissolve something, you cannot taste it.",
"If the human eye was a digital camera it would have 576 megapixels.",
"If the lining of mucus were to disappear from your stomach, your stomach would digest itself.",
"If uncoiled, the DNA in all the cells in your body would stretch 10 billion miles, from here to Pluto and back.",
"If you blink one eye you move over 200 muscles.",
"If you could save all the times your eyes blink in one life time and use them all at once you would see blackness for 1.2 years!",
"If you remove the minerals from a bone by soaking it overnight in a six percent solution of hydrochloric acid, it will become so soft, you could tie it in a knot.",
"If you spread it out, your brain would be about the size of a pillowcase.",
"If you toot consistently for 6 years and 9 months, enough gas is produced to create the energy of an atomic bomb.",
"If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee.",
"If your stomach acid got onto your skin it would burn a hole in it.",
"In 24 hours, the blood in the body travels a total of 12,000 miles - that's four times the width of North America.",
"In 2008 scientists discovered a new species of bacteria that lives in hairspray.",
"In a human body, the small intestine is 21 feet and the large intestine is 6 feet long.",
"In a lifetime, a human being will grow six feet of nose hair and shed 42 lbs of dead skin.",
"In a lifetime, the human kidneys clean over 1 million gallons of blood.",
"In a lifetime, your brain's long-term memory can hold as many as 1 quadrillion (1 million billion) separate bits of information.",
"In a year on an average person sleeps for 122 days out of 365 days.",
"In an average person, it takes 8 seconds for food to travel down the food pipe, 3-5 hours in the small intestine and 3-4 days in the large intestine.",
"In each kidney, there are 1 million filters that clean around 1.3 liters of blood every minute and push out close to 1.5 liters of urine every day.",
"In just 30 minutes, your body can produce enough heat to boil half a gallon of water.",
"In one square inch of our hand we have nine feet of blood vessels, 600 pain sensors, 9000 nerve endings, 36 heat sensors and 75 pressure sensors.",
"In one square inch of skin there are 4 yards of nerve fibers.",
"In one square inch of skin, there are 3 million cells.",
"In order to taste something, our saliva needs to dissolve it (try drying off your tongue and tasting something).",
"In CoolHuman, astronauts cannot cry, because there is no gravity, so the tears can't flow!",
"In the average lifetime, we spend five years eating and we consume around 7,000 times our own weight in food.",
"In the middle of the day, our eyesight will be sharper.",
"In the womb, the baby's body is covered by a thin layer of hair but as soon as the baby is born it disappears.",
"In your very own lifetime, you'll produce enough spit to fill two swimming pools.",
"India is the diabetes capital of the world. It is estimated that currently there are 40 million people with diabetes in India and by 2025 this number will swell to 70 million. This would mean every fifth diabetic in the world would be an Indian.",
"Information travels at different speeds within different types of neurons.",
"Inner ear is the main organ of balance.",
"Inside your belly button are thousands of bacteria that form an ecosystem the size of an entire rainforest.",
"It can take your finger and toenails 1/2 a year to grow an entirely new nail (from base to tip).",
"It is believed that the main purpose of eyebrows is to keep sweat out of the eyes.",
"It is estimated that there are over 1, 000,000,000,000,000 connections in the human brain.",
"It is impossible to tickle ourselves.",
"It only takes 7 pounds of pressure to rip your ear off.",
"It takes 5 - 30 seconds to chew food. Swallowing the food takes about 10 seconds.",
"It takes 17 muscles to smile and 43 to frown.",
"It takes about 20 seconds for a red blood cell to circle the whole body.",
"It takes time for a newborn baby to learn to turn the pictures right side up, as it sees the world upside down in the beginning.",
"It takes twice as long to lose new muscle if you stop working out than it did to gain it.",
"It's impossible to sneeze with your eyes open.",
"It's nearly impossible to tickle yourself.",
"Laughing and coughing creates more pressure on the spine than walking or standing.",
"Like fingerprints, every person has a unique tongue print.",
"Liver cells take several years to replace themselves.",
"Liver is the only organ of the body, which regenerates itself completely even after being removed completely.",
"Loneliness is physically painful.",
"Male hairs are denser and grow faster than females.",
"Melanin, a pigment present in the skin is responsible for the color of the skin in a person.",
"Men can read smaller print than women; women can hear better.",
"Men listen with the left side of the brain and women use both sides of the brain.",
"Men produce about 10 million new sperm daily (approximately enough to repopulate the entire planet in 6 months).",
"Monday is the day of the week when the risk of heart attack is greatest.",
"More germs are transferred shaking hands than kissing.",
"Most babies are born with blue eyes; exposure to UV light brings out their true color.",
"Most men have erections every hour to hour and a half during sleep.",
"Most of the dust underneath your bed is actually your own dead skin.",
"Most people blink about 25 times per minute.",
"Most people have lost fifty per cent of their taste buds by the time they reach the age of sixty.",
"Most people have three types of color receptors to see color vision, while some women have four or even five of these receptors and can see a wider range of colors.",
"Most westerners consume 50 tons of food and 50,000 liters of liquid in their lifetime.",
"Muscle tissue is three times more efficient at burning calories than fat.",
"Muscle tissue is three times more efficient at burning calories than fat.",
"Nails and corneas are the only two tissues in the body that do not receive oxygen from blood.",
"Nails and hair do not continue to grow after we die.",
"Nails of toes or fingers take about 6 months to grow from base to tip.",
"Nerve impulses to and from the brain travel as fast as 170 miles per hour.",
"Neurons continue to grow throughout human life.",
"Newborns will cry out without tears for the first three to six weeks.",
"Normal human pulse rate is around 70 heartbeats per minute.",
"Oesophagus/or food pipe, which is the passage for the food we eat to the stomach, is approximately 25 cm long.",
"On an average 1.7 liters of saliva produces each day.",
"On an average a persons head has 100,000 to 150,000 hairs.",
"On an average an adults heart pumps about 4,000 gallons of blood each day.",
"On an average it takes about 13 days for a grey hair to grow.",
"On an average the human scalp has about 100,000 hairs.",
"On an average the weight of an adult female brain is about 1275 grams.",
"On an average, 100,000 to 1,000,000 chemical reactions takes place in our brain.",
"On an average, a persons left hand does 56 % of typing.",
"On an average, in an adult scalp 35m of hair fiber is produced every day.",
"On an average, the human growth hormone, which is responsible for a person growth is produced at the rate of 500 microgram per day at the age of twenty, 200 microgram per day at the age of forty and 25 microgram per day at the age of eighty.",
"On average people fear spiders more than they do death.",
"On average, the human stomach holds about 2 liters of contents.",
"On average, the number of connections in the brain increases from 50 trillion to 1 quadrillion in a newborn during his first month of life.",
"On average, we speak about 5,000 words per day.",
"One human hair can support 3.5 ounces.",
"One in every 1000 babies is born with a tooth.",
"One out of every 2,000 newborn infants has a tooth when they are born.",
"One person in 20 has an extra rib, and they are most often men.",
"One square inch of human skin contains 625 sweat glands.",
"Only four percent of the brains cells work and the remaining cells are kept in reserve.",
"Only one person in two billion will live for more than 115 years of life.",
"Our blood is on a 60,000-mile journey per day.",
"Our Brain has over 100 billion nerve cells.",
"Our eyes can distinguish up to ten million color surfaces and take in more information than the largest telescope known to man.",
"Our eyes never grow, and our nose and ears never stop growing.",
"Our heart beats around 100,00 times every day or about 30 million times in a year.",
"Our lungs inhale over two million liters of air every day, without even thinking.",
"Our Muscles often work in pairs so that they can pull in different or opposite directions.",
"Our nose is our personal air-conditioning system: it warms cold air, cools hot air and filters impurities.",
"Ovaries contain over 500,000 eggs, but only about 400 get the opportunity to create life.",
"Over 90% of diseases are caused or complicated by stress.",
"Over the course of your lifetime, you'll shed about 40lbs of skin.",
"People are the only animals in the world who cry tears.",
"People under 30 years of age take in double the amount of oxygen as people over 80 years of age.",
"People with blue eyes have a higher alcohol tolerance.",
"People with dark color skin wrinkle later than people having light color skins.",
"Plaque begins to form 6 hours after brushing our teeth.",
"Platelets, which are one of the constituents of the blood are produced at the rate of one hundred billion per day.",
"Pregnancy in women lasts on average of about 270 days from the time of conception till birth.",
"Reading aloud to children helps to stimulate brain development.",
"Red blood cells are about seven micrometer in diameter.",
"Red Blood Cells are the only cells in the body that do not have a nucleus.",
"Red Blood Cells comprise about 40% of blood volume.",
"Red Blood Cells lasts only for about 4 months before they wear out.",
"Right-handed people live, on average, nine years longer than left-handed people do.",
"Right-handed people live, on average, nine years longer than left-handed people do.",
"Scientists say the higher your I.Q. the more you dream.",
"Seven out of ten people cross their left arm over their right.",
"Shivering is a way of trying to keep our body warm.",
"Sixty percent of the human body nerve ends in the forehead and the hands.",
"Skin can now be artificially grown.One amazing result of this is that the skin from one hand could be grown into enough to cover six football pitches.",
"Sleeping less than 7 hours each night reduces your life expectancy.",
"Sneezes regularly exceed 100 mph.",
"Sneezing too hard can cause a rib fracture while suppressing a sneeze can cause damage to the blood vessels of the head or neck.",
"Sometimes, when you have to pee, you can visibly see that your bladder is bigger.",
"Sound that is above 130 decibels can cause pain to our ears.",
"sperm containing the XY chromosomes to become a male can swim faster but not for as long as the female xx chromosomes.",
"Straight hair lies flat because it is round and grows out of round follicles.",
"Redheads have the least dense hair, averaging about 86,000 follicles.",
"Taste buds are present inside the mouth and also at the roof of the mouth.",
"Tears and mucus contain an enzyme (lysozyme) that breaks down the cell wall of many bacteria.",
"The human spinal cord is 45 cm long in men and 43 cm long in women.",
"The adrenal glands change size throughout life.",
"The adult human brain is about 2% of total body weight.",
"The amount of carbon in the human body is enough to fill about 9,000 'lead' pencils.",
"The aorta, the largest artery in the body, is almost the diameter of a garden hose.",
"The ashes of a cremated person average about 9 pounds.",
"The atoms that make up your body are mostly empty CoolHuman, despite there being so many of them, without that CoolHuman you would compress into a tiny volume.",
"The average human brain weighs about 3 pounds.",
"The average human head has 100,000 hair follicles, each of which is capable of producing 20 individual hairs during a person's lifetime. Blonds average 146,000 follicles. People with black hair tend to have about 110,000 follicles, while those with brown hair are right on",
"The average human head weighs about 10 pounds.",
"The average length of the human brain is about 167 mm and its average height is 93mm.",
"The average life span of a sperm is about 36 hours.",
"The average person expels flatulence 14 times each day.",
"The average person falls asleep in seven minutes.",
"The average person has about 100 000 scalp hairs.",
"The average person is about a quarter of an inch taller at night.",
"The average person produces enough saliva in their lifetime to fill 2 swimming pools.",
"The average red blood cell lives for 120 days.",
"The base of the spinal cord has a cluster of nerves, which are most sensitive.",
"The brain continues to send out electric wave signals until approximately 37 hours after death.",
"The brain is much more active at night than during the day.",
"The brain itself cannot feel pain.",
"The brain operates on the same amount of power as 10-watt light bulb. Your brain generates as much energy as a small light bulb even when you're sleeping.",
"The cells of taste buds are constantly being renewed, roughly on every ten hours.",
"The cells of the heart and brain do not multiply through out their lifetime.",
"The chemical elements that make up your body are worth around US$160.",
"The colder the room you sleep in, the better the chances are that you'll have a bad dream.",
"The color of our hair is also determined by the melanin, a pigment present in the human body.",
"The current cost of treating diabetes and its complications in the world is estimated at USD 215-375 billion.",
"The DNA helix measures 80 billionths of an inch wide.",
"The ears never stop growing through lifetime.",
"The enzyme in the stomach that breaks down alcohol is produced less in men than women.",
"The eyeball of a human weighs approximately 28 grams.",
"The eyelashes shed by a human in his entire life is of 30 m of length.",
"The eyes have the fastest reacting muscle in the whole body. It contracts in 1/100th of a second.",
"The fastest growing nail is on the middle finger.",
"The feet account for one quarter of all the human body's bones.",
"The female body is capable of giving birth to 35 children in one lifetime.",
"The female egg cell is the largest cell in the human body. It is about 175 000 times heavier than the smallest cell, the male sperm cell.",
"The femur/thigh bone is the longest bone in our body, it is about a quarter of ones height.",
"The food will get in to the stomach even if one stands on their head.",
"The formation of your egg, and the half of your DNA that came from your mother, could be considered the very first moment of your existence. It happened before your mother was born. If your mother was 30 when she had you, then on your 18th birthday you were arguably over 48 years old.",
"The gastric acid in your stomach is so powerful that it is able to eat away an iron table in about 5 minutes.",
"The gastrointestinal tract is a 30-foot (9 m) tube running from your mouth to your anus.",
"The hardest bone in the human body is the jawbone.",
"The heart muscles will stop working only when we die.",
"The heart pumps about 1 million barrels of blood during an average lifetime - that's enough to fill 2 oil super tankers!",
"The highest recorded body temperature in a human being was a fever of 115.7 F (46.5 C).",
"The human body consists of over 600 muscles.",
"The human body contains 30 000 billion red blood cells.",
"The human body contains 30 amazing hormones, which regulates activities like sleep, body temperature, hunger, and managing stress in times of crisis and so on.",
"The human body has 4 million pain sensitive structures.",
"The human body has 230 movable and semi-movable joints.",
"The human body has less muscles in it than a caterpillar.",
"The human body is estimated to have 60,000 miles of blood vessels.",
"The human body makes 2.5 million Red Blood Cells every second or about 200 billion Red Blood Cells every day.",
"The human body releases growth hormones during sleep.",
"The human body takes 6 hours to digest a high fat meal and it takes 2 hours for a carbohydrate meal.",
"The human brain can read up to 1,000 words per minute.",
"The human brain cell can hold 5 times as much information as the Encyclopedia Britannica. Or any other encyclopedia for that matter.",
"The Human brain constitutes 60% of white matter and 40% of grey matter.",
"The human brain is capable of creating more ideas equivalent to that of the atoms of the universe.",
"The human brain is made up of more than 10 billion nerve cells and over 50 billion other cells and weighs less than three pounds.",
"The Human brain is the most powerful computer which has the processing speed of 3000+ Ghz",
"The human brain is very soft like butter.",
"The Human brain stops growing at the age of 18.",
"The human Brain uses 20% of our body energy and makes up only 2% of our body weight.",
"The human ear can distinguish between hundreds of thousands of different sounds.",
"The human ears can hear in the frequency of 1,000 to 50,000 hertz.",
"The human eye cannot perceive a motionless image.",
"The human eye contains five to seven million receptors for color perception.",
"The human eye contains structures called Rods and cones. Rods register the shapes of images and respond to low levels of light and Cones responds to bright lights and registers the color of images.",
"The human eye has 110-130 million receptors to perceive light.",
"The Human eye is the only multi-focus lens in the world which can adjust in 2 milliseconds.",
"The human eyeball is 24.5 mm long.",
"The human gut contains about 1kg (2.2 lbs) of bacteria.",
"The human hand contains three main nerves, two major arteries and 27 different bones - more of the body is devoted to controlling the hands than any other part of the body.",
"The human head is one-quarter of our total length at birth but only one-eighth of our total length by the time we reach adulthood.",
"The human heart beats 30 million times a year.",
"The human heart continues to beat for 5 seconds even after it is taken out of the body.",
"The human heart creates enough pressure when it pumps blood, that it could squirt blood 30 feet.",
"The human heart is not on the left-hand side of the body; it's in the middle.",
"The human heart pumps 6,000 liters of blood daily through a man lifetime.",
"The human Liver consists of 100,000 tiny clusters called lobules.",
"The human liver performs 500 different functions.",
"The human sense of smell has the ability to identify the chemical smell of an object in one part per trillion of air.",
"The human skeleton renews once in every three months.",
"The human skin sheds and re-grows after every 27 days.",
"The human stomach contains about 35 million small digestive glands.",
"The human tongue has 10,000 taste buds.",
"The Hyoid bone, in your throat is the only bone in your body which not attached to other bones.",
"The Iris is the part of the eye that determines the color of the eye.",
"The kidneys filter your blood up to 300 times per day.",
"The largest cell in the human body is the female egg and the smallest is the male sperm.",
"The largest cell in the woman is the egg or ovum present that is released from the ovaries.",
"The largest internal organ is the small intestine.",
"The left side of human brain controls the right side of the body and the right side of the brain controls the left side of the body.",
"The left side of the human heart is much thicker and stronger than the right side.",
"The leg bone is the fastest growing bone in the human body.",
"The length of human blood vessel is such that it circles the globe 2 1/2 times.",
"The length of the finger indicates how fast the nail grows. The nail of the middle finger grows faster than others.",
"The length of your foot is the same as that of your forearm between your wrist and the inside of your elbow.",
"The lens of the human eye is composed of 65% water and 3% protein.",
"The life span of a taste bud is ten days.",
"The life span of an ovule is about 12 - 24 hours.",
"The lifespan of a human hair is 3 to 7 years on average.",
"The liquid inside young coconuts can be used as a substitute for blood plasma.",
"The liver is the largest and heaviest internal organ of the body and weighs about 1.6 kilos.",
"The longest muscle in the human body is sartorius, which is present in the hip region and it is commonly called as tailors muscle.",
"The longest time between two twins being born is 87 days.",
"The maximum length of hair can be 70 to 90 cms.",
"The middle part of the back is the least sensitive part of our body.",
"The most common blood type in the world is Type O.",
"The muscles of our body constitute 40% of our body weight.",
"The muscles of the eye move more than 100,000 times a day.",
"The muscles that control your eyes contract about 100,000 times a day (that's the equivalent of giving your legs a workout by walking 50 miles).",
"The nerve cells present in the nose, allows us to smell and regenerates through out ones life.",
"The Nervous system transmits messages to the brain at the speed of 180 miles per hour.",
"The only joint-less bone in the human body is the hyoid bone, which is present in the throat area.",
"The ovaries of a female contain about 600,000 immature eggs at birth.",
"The palms of the hands and soles of the feet contain more sweat glands than other parts of the body.",
"The pigment of human hair is produced in the shaft of hair beneath the skin.",
"The Pulmonary vein is the only vein in the human body that carries oxygenated blood while all the other veins of the body carry de-oxygenated blood.",
"The reason honey is so easy to digest is that it's already been digested by a bee.",
"The right side of the human brain is responsible for self-recognition.",
"The Romans used to clean and whiten their teeth with urine.",
"The sense of taste is the weakest of the five senses.",
"The shoulder blade is connected to the body by means of 15 different muscles and it is not attached to a single bone.",
"The soles of your feet contain more sweat glands and more pressure-sensitive nerve endings per square inch than any other part of your body.",
"The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.",
"The spinal cord, which controls over 10 billion nerve cells, is less than two feet in length and its diameter is same as that of the index finger.",
"The strongest muscles of the human body are masseters, which are present on either side of the mouth.",
"The surface area of a human lung is equal to that of a tennis court.",
"The surface of human tongue is covered with 100 of tiny structures called papillae.",
"The thighbone is so strong that it withstands the axial load of about 1600-1800 kilos.",
"The three things pregnant women dream most of during their first trimester are frogs, worms and potted plants.",
"The thumbnail grows the slowest; the middle nail grows the fastest.",
"The tiniest muscle, the stapedius of the middle ear , is just one-fifth of an inch long.",
"The tips of your fingers have enough strength to support the weight of your whole body.",
"The tooth is the only part of the human body that can't repair itself.",
"The tooth is the only part of the human body that cannot heal and repair by its own.",
"The total surface area of the human brain is about 25,000 square cms.",
"The wax present inside the ear is made up of oil and sweat.",
"The weight of human cerebellum is 150g.",
"The weight of skin in a human adult is 8 to 10 pounds.",
"The white part of our fingernail is called as Lunula.",
"The width of an average human brain is 140 mm.",
"The width of your arm-span stretched out is the length of your whole body.",
"There are 2.5 trillion (give or take) of red blood cells in your body at any moment.",
"There are 22 bones in the human skull.",
"There are 137 million light sensitive cells in the eye's retina and the fluid that fills the eye is changed 15 times a day.",
"There are about 13, 500,00 neurons in the human spinal cord.",
"There are about 30 - 40 billion white blood cells present in our body to fight against infective and foreign organisms.",
"There are approximately 96,000 km of blood vessels in the human body.",
"There are around 1,200,000 optic fibers in the human eye.",
"There are around 100 receptors in each of our fingertips.",
"There are as many hairs per square inch on your body as a chimpanzee.",
"There are more living organisms on the skin of a single human being than there are human beings on the surface of the earth.",
"There are more than 100 types of cancers; any part of the body can be affected.",
"There are more than 300,000,000 capillaries in your lungs and if they were stretched out tip to tip they would reach approximately the distance between Atlanta and LA.",
"There is more bacteria in your mouth than the human population of the United States and Canada combined .",
"There is no scientific evidence that shaving or waxing will make your hair come back thicker.",
"Three hundred million cells die in the human body every minute.",
"Threshold pain of women is 9 times stronger than men.",
"Tongue is the strongest muscle in the human body.",
"Tooth decay has led to 60 percent of adult Americans losing their upper right, middle molar.",
"U.S. park ranger Roy C. Sullivan held the record for being struck by lightning the most times and surviving - 7 times between 1942 and 1977.",
"Vitamin C and E fights against Dementia.",
"Vitamin E protects the brain cells from damage caused by alcohol consumption.",
"We all have tiny mites living in our eyelashes.",
"We are about 1 cm taller in the morning than in the evening.",
"We are about 70 percent water.",
"We are more likely to catch cold from a person by shaking his hand than from his sneeze.",
"We breathe 13 pints of air every minute.",
"We exercise at least 36 muscles when we smile.",
"We give birth to over 200 billion red cells every day.",
"We have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and silicon in our bodies.",
"We make around 1 to 1.6 litres of saliva a day.",
"We share 98.4% of our DNA with a chimp - and 70% with a slug.",
"We shut our eyes for 0.3 seconds, when we blink.",
"When full, the human bladder can hold two pints of urine.",
"When in love, the brain releases the same cocktail of neurotransmitters and hormones that are released by amphetamines, leading to increased heart rate, loss of appetite and sleep, and intense feelings of excitement.",
"When put under the microscope, crying over grief, hope, or onions all produced a unique tear.",
"When we go to sleep and enter REM (Rapid Eye Movement),our bodies become completely paralysed as areas of the brain that control movement are de-activated.",
"When we see an image, the human eye captures the inverted image of it. It is the brains interpretation that makes us to see the upside down captured image in to a normal erect image.",
"When we touch something, we send a message to our brain at 124 mph.",
"When you blush, your stomach lining also reddens.",
"When you look at an object, the image of that object appears upside down on your retina. However, your brain automatically corrects for this, allowing you to perceive the object the right side up.",
"When you were born, you had 300 bones. Now you have 206, if you are an adult. The rest of the bones have not disappeared - they have merely fused together.",
"Why doesn't your stomach digest itself? That's because your stomach cells are created faster than they can be destroyed.",
"Within three days of death, the enzymes that once digested your dinner begin to eat you.",
"Women are born better smellers than men and remain better smellers over life.",
"Women blink nearly twice as much as men.",
"Women blink twice as many times as men do.",
"Women burn fat more slowly than men, by a rate of aabout 50 calories a day.",
"Women have better sense of smell than men.",
"Women's hair is about half the diameter of men's hair.",
"Women's hearts beat faster than men's.",
"Yawning brings more oxygen to the lungs.",
"You are more likely to be killed by a champagne cork than by a poisonous spider.",
"You are taller in the morning than in the evening.",
"You breathe in about 7 quarts of air every minute.",
"You burn more calories while sleeping than you do when watching television.",
"You can go without eating for weeks without succumbing, but eleven days is tops for going without sleep.",
"You can only smell 1/20th as well as a dog.",
"You can see ultraviolet light, the ability is just filtered out by the eye's lens.",
"You could remove a large part of your internal organs and survive.",
"You get a new stomach lining every three to four days.",
"You have about half-a-million sweat glands that produce about a pint of sweat daily.",
"You have no sense of smell when you're sleeping.",
"You must lose over 50% of your scalp hairs before it is apparent to anyone.",
"You need to consume a quart of water each day for four months to equate to the amount of blood your heart pumps in one hour.",
"You sit on the biggest muscle in your body, the gluteus maximus a.k.a. the butt.",
"You use 200 muscles to take one step.",
"You'll be about 1cm shorter when you go to bed at night compared to when you wake up in the morning. Your cartilage in your spine slowly compresses throughout the day.",
"Your body contains enough iron to make a spike strong enough to hold your weight.",
"Your body gives off enough heat in 30 minutes to bring half a gallon of water to a boil.",
"Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute.",
"Your body has enough iron in it to make a nail 3 inches long.",
"Your body produces enough heat in only thirty minutes to boil a half-gallon of water.",
"Your bones are composed of 31% water.",
"Your bones, pound for pound, are 4 times stronger than concrete.",
"Your brain uses 20% of the oxygen that enters your bloodstream.",
"Your brain uses about 20% of your oxygen and caloric intake.",
"Your DNA includes the genes from at least eight retroviruses.",
"Your ears secrete more earwax when you are afraid than when you aren't.",
"Your eyeballs are three and a half percent salt.",
"Your eyes are always the same size from birth but your nose and ears never stop growing.",
"Your foot contains 25% of all the bones within your body.",
"Your heart beats 100,000 times a day.",
"Your heart will pump nearly 1.5 million barrels of blood during your lifetime, enough to fill 200 train tank cars.",
"Your heartbeat changes and mimics the music you listen to.",
"Your left lung is smaller than your right lung to make room for your heart.",
"Your nose can remember 50,000 different scents.",
"Your ribs move about 5 million times a year, every time you breathe!",
"Your skin is an organ.",
"Your skin is the largest organ in your body; if an adult male's skin were to be stretched out, it would cover 20 square feet.",
"Your stomach manufactures a new lining every three days to avoid digesting itself.",
"Your teeth start growing 6 months before you are born."

 * The AlexaSkill prototype and helper functions
var AlexaSkill = require('./AlexaSkill');

 * CoolHuman is a child of AlexaSkill.
 * To read more about inheritance in JavaScript, see the link below.
 * @see
var CoolHuman = function () {, APP_ID);

// Extend AlexaSkill
CoolHuman.prototype = Object.create(AlexaSkill.prototype);
CoolHuman.prototype.constructor = CoolHuman;

CoolHuman.prototype.eventHandlers.onSessionStarted = function (sessionStartedRequest, session) {
    console.log("CoolHuman onSessionStarted requestId: " + sessionStartedRequest.requestId
        + ", sessionId: " + session.sessionId);
    // any initialization logic goes here

CoolHuman.prototype.eventHandlers.onLaunch = function (launchRequest, session, response) {
    console.log("CoolHuman onLaunch requestId: " + launchRequest.requestId + ", sessionId: " + session.sessionId);

 * Overridden to show that a subclass can override this function to teardown session state.
CoolHuman.prototype.eventHandlers.onSessionEnded = function (sessionEndedRequest, session) {
    console.log("CoolHuman onSessionEnded requestId: " + sessionEndedRequest.requestId
        + ", sessionId: " + session.sessionId);
    // any cleanup logic goes here

CoolHuman.prototype.intentHandlers = {
    "GetNewFactIntent": function (intent, session, response) {

    "AMAZON.HelpIntent": function (intent, session, response) {
        response.ask("You can ask Cool Human Body Facts tell me a Cool fact, or, you can say exit... What can I help you with?", "What can I help you with?");

    "AMAZON.StopIntent": function (intent, session, response) {
        var speechOutput = "Goodbye";

    "AMAZON.CancelIntent": function (intent, session, response) {
        var speechOutput = "Goodbye";

 * Gets a random new fact from the list and returns to the user.
function handleNewFactRequest(response) {
    // Get a random CoolHuman fact from the CoolHuman facts list
    var factIndex = Math.floor(Math.random() * CoolHuman_facts.length);
    var fact = CoolHuman_facts[factIndex];

    // Create speech output
    var speechOutput = "Do You know that: " + fact;

    response.tellWithCard(speechOutput, "CoolHuman", speechOutput);

// Create the handler that responds to the Alexa Request.
exports.handler = function (event, context) {
    // Create an instance of the CoolHuman skill.
    var CoolHuman = new CoolHuman();
    CoolHuman.execute(event, context);


    Copyright 2014-2015, Inc. or its affiliates. All Rights Reserved.

    Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at

    or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

'use strict';

function AlexaSkill(appId) {
    this._appId = appId;

AlexaSkill.speechOutputType = {
    PLAIN_TEXT: 'PlainText',
    SSML: 'SSML'

AlexaSkill.prototype.requestHandlers = {
    LaunchRequest: function (event, context, response) {, event.request, event.session, response);

    IntentRequest: function (event, context, response) {, event.request, event.session, response);

    SessionEndedRequest: function (event, context) {
        this.eventHandlers.onSessionEnded(event.request, event.session);

 * Override any of the eventHandlers as needed
AlexaSkill.prototype.eventHandlers = {
     * Called when the session starts.
     * Subclasses could have overriden this function to open any necessary resources.
    onSessionStarted: function (sessionStartedRequest, session) {

     * Called when the user invokes the skill without specifying what they want.
     * The subclass must override this function and provide feedback to the user.
    onLaunch: function (launchRequest, session, response) {
        throw "onLaunch should be overriden by subclass";

     * Called when the user specifies an intent.
    onIntent: function (intentRequest, session, response) {
        var intent = intentRequest.intent,
            intentName =,
            intentHandler = this.intentHandlers[intentName];
        if (intentHandler) {
            console.log('dispatch intent = ' + intentName);
  , intent, session, response);
        } else {
            throw 'Unsupported intent = ' + intentName;

     * Called when the user ends the session.
     * Subclasses could have overriden this function to close any open resources.
    onSessionEnded: function (sessionEndedRequest, session) {

 * Subclasses should override the intentHandlers with the functions to handle specific intents.
AlexaSkill.prototype.intentHandlers = {};

AlexaSkill.prototype.execute = function (event, context) {
    try {
        console.log("session applicationId: " + event.session.application.applicationId);

        // Validate that this request originated from authorized source.
        if (this._appId && event.session.application.applicationId !== this._appId) {
            console.log("The applicationIds don't match : " + event.session.application.applicationId + " and "
                + this._appId);
            throw "Invalid applicationId";

        if (!event.session.attributes) {
            event.session.attributes = {};

        if ( {
            this.eventHandlers.onSessionStarted(event.request, event.session);

        // Route the request to the proper handler which may have been overriden.
        var requestHandler = this.requestHandlers[event.request.type];, event, context, new Response(context, event.session));
    } catch (e) {
        console.log("Unexpected exception " + e);;

var Response = function (context, session) {
    this._context = context;
    this._session = session;

function createSpeechObject(optionsParam) {
    if (optionsParam && optionsParam.type === 'SSML') {
        return {
            type: optionsParam.type,
            ssml: optionsParam.speech
    } else {
        return {
            type: optionsParam.type || 'PlainText',
            text: optionsParam.speech || optionsParam

Response.prototype = (function () {
    var buildSpeechletResponse = function (options) {
        var alexaResponse = {
            outputSpeech: createSpeechObject(options.output),
            shouldEndSession: options.shouldEndSession
        if (options.reprompt) {
            alexaResponse.reprompt = {
                outputSpeech: createSpeechObject(options.reprompt)
        if (options.cardTitle && options.cardContent) {
            alexaResponse.card = {
                type: "Simple",
                title: options.cardTitle,
                content: options.cardContent
        var returnResult = {
                version: '1.0',
                response: alexaResponse
        if (options.session && options.session.attributes) {
            returnResult.sessionAttributes = options.session.attributes;
        return returnResult;

    return {
        tell: function (speechOutput) {
                session: this._session,
                output: speechOutput,
                shouldEndSession: true
        tellWithCard: function (speechOutput, cardTitle, cardContent) {
                session: this._session,
                output: speechOutput,
                cardTitle: cardTitle,
                cardContent: cardContent,
                shouldEndSession: true
        ask: function (speechOutput, repromptSpeech) {
                session: this._session,
                output: speechOutput,
                reprompt: repromptSpeech,
                shouldEndSession: false
        askWithCard: function (speechOutput, repromptSpeech, cardTitle, cardContent) {
                session: this._session,
                output: speechOutput,
                reprompt: repromptSpeech,
                cardTitle: cardTitle,
                cardContent: cardContent,
                shouldEndSession: false

module.exports = AlexaSkill;

Intent Schema


	  "intents": [


	      "intent": "GetNewFactIntent"



	      "intent": "AMAZON.HelpIntent"



	      "intent": "AMAZON.StopIntent"



	      "intent": "AMAZON.CancelIntent"





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