Human Facts

92 facts tagged with Human Facts

  • 1
    When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
  • 2
    A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
  • 3
    Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
  • 4
    Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
  • 5
    Early American humans hunted car-size armadillos and used their shells for houses.
  • 6
    The human sigh acts as a physiological reset button.
  • 7
    Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
  • 8
    In one day, adult lungs move about 10,000 litres of air.
  • 9
    Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
  • 10
    We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
  • 11
    Our brains have a negativity bias and will remember bad memories more than good ones.
  • 12
    The average sperm cell swims at 8 inches per hour.
  • 13
    Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
  • 14
    A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
  • 15
    The human brain is more active during sleep than during the day.
  • 16
    If the human eye was a digital camera, it would have 576 megapixels.
  • 17
    It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
  • 18
    Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
  • 19
    The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
  • 20
    The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
  • 21
    If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
  • 22
    Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
  • 23
    Research has determined that most people are happiest at 7:26pm on a Saturday night.
  • 24
    The average person will go on a date at least 100 times before they finally marry.
  • 25
    There are about 255 babies born worldwide every minute.
  • 26
    Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
  • 27
    You can't tickle yourself.
  • 28
    An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
  • 29
    Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
  • 30
    Research suggests that laziness is just a natural part of being a teenager and doesn't reflect bad behavior.
  • 31
    Enamel is hardest substance in the human body.
  • 32
    The human brain doesn't stop developing until about 25 years old.
  • 33
    The world's shortest man measures only 21.5 inches.
  • 34
    Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
  • 35
    There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
  • 36
    Obsessive nose picking is called Rhinotillexomania.
  • 37
    You forget 90% of your dreams.
  • 38
    An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
  • 39
    Your thumb is about the same size as your nose.
  • 40
    Poor eyesight (myopia) is associated with higher IQ.
  • 41
    Yawns are more contagious among people with closer relationships.
  • 42
    For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
  • 43
    If your DNA was stretched out it would reach to the moon 6,000 times.
  • 44
    It has been scientifically proven that stroking a cat can lower one's blood pressure!
  • 45
    By weight, Bone is five times stronger than steel.
  • 46
    It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
  • 47
    In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
  • 48
    A human being loses an average of 40 to 100 strands of hair a day.
  • 49
    Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
  • 50
    We share 70% of our DNA with a slug.
  • 51
    Gorillas can catch human colds and other illnesses.
  • 52
    A person can live without food for about a month, but only about a week without water.
  • 53
    Tigers can see 6 times better at night than humans.
  • 54
    Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
  • 55
    After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
  • 56
    Babies crawl an average of 200m a day.
  • 57
    A man's beard grows fastest when he anticipates sex.
  • 58
    Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
  • 59
    Your heart will pump about 212 million liters in its lifetime.
  • 60
    The human brain uses approximately as much energy as a 10 watt light bulb.
  • 61
    On average a woman has 4 sexual partners in her lifetime.
  • 62
    Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
  • 63
    The human body contains over a billion miles of DNA.
  • 64
    Every human spent about half an hour as a single cell.
  • 65
    On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
  • 66
    Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
  • 67
    Pain occurs when sounds are above 130 db.
  • 68
    The adult human brain weighs about 3 pounds (1,300-1,400 g).
  • 69
    All 13 minerals necessary for human life can be found in alcohol beverages.
  • 70
    Our Right Lungs takes more air than our left lung.
  • 71
    Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
  • 72
    Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
  • 73
    A person will create enough saliva to fill two average size swimming pools during his lifetime.
  • 74
    Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
  • 75
    Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
  • 76
    If your liver stopped working, you'd die within 24 hours.
  • 77
    In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
  • 78
    Our eyes are always the same size from birth, but our nose and ears never stop growing.
  • 79
    One human hair can support 3 ounces.
  • 80
    It takes twice as long to lose new muscle if you stop working out than it did to gain it.
  • 81
    The average person's skin weighs twice as much as their brain.
  • 82
    The largest cell in the human body is the female egg and the smallest is the male sperm.
  • 83
    Your fingernails grow faster in summer.
  • 84
    When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
  • 85
    Only humans shed emotional tears.
  • 86
    The human brain has the capacity to store everything that you experience.
  • 87
    On average, there's 100 billion neurons in the human brain.
  • 88
    It takes approximately 12 hours for food to entirely digest.
  • 89
    The human eye blinks an average of 4,200,000 times a year.
  • 90
    Men can read smaller print than women can; women can hear better.
  • 91
    It takes about 20 seconds for a red blood cell to circle the whole body.
  • 92
    Human hair and fingernails continue to grow after death.