1. Your nose can remember 50,000 different scents.
2. Humans shed about 600,000 particles of skin every hour.
3. An adult human being is made up of around 7,000,000,000,000,000,000,000,000,000 atoms.
4. A human baby has over 90 more bones than an adult.
5. There are 100,000 miles of blood vessels in an adult human body.
6. An average person produces about 25,000 quarts of saliva in a lifetime, enough to fill two swimming pools.
7. Your body has enough iron in it to make a metal nail 3 inches long.
8. We all have tiny mites living in our eyelashes.
9. The strongest muscle in the human body is the masseter (jaw muscle).
10. Sweat itself is odorless. It's the bacteria on the skin that mingles with it and produces body odor.
11. Having excessive body hair is linked to a higher intellect.
12. Ears and Nose never stop growing.
13. Similar to fingerprints, everyone also has a Unique Tongue Print.
14. When awake, the human brain produces enough electricity to power a small light bulb.
15. Human Bones are, ounce for ounce, stronger than steel.
16. People with blue eyes have a higher alcohol tolerance.
17. The human eye can distinguish about 10 million different colors.
18. We spend about 10% of our waking hours with our eyes closed, blinking.
19. If the human eye was a digital camera it would have 576 megapixels.
20. All of the bacteria in our body collectively weighs about 4 pounds.
21. The human body produces about a litre (0.26 gal) of mucus per day.
22. There are more than 100 types of cancers; any part of the body can be affected.
23. Your heartbeat changes and mimics the music you listen to.
24. Your brain uses 20% of the total oxygen and blood in your body.
25. Your bones are composed of 31% water.
26. There're more bacteria in your mouth than there are people in the world.
27. Every day, your heart creates enough energy to drive a truck for 20 miles (32 km).
28. If uncoiled, the DNA in all the cells in your body would stretch 10 billion miles, from here to Pluto and back.
29. Most of the dust underneath your bed is actually your own dead skin.
30. Within three days of death, the enzymes that once digested your dinner begin to eat you.
31. Sleeping less than 7 hours each night reduces your life expectancy.
32. In a lifetime, your brain's long-term memory can hold as many as 1 quadrillion (1 million billion) separate bits of information.
33. The gastrointestinal tract is a 30-foot (9 m) tube running from your mouth to your anus.
34. Your heart will pump nearly 1.5 million barrels of blood during your lifetime, enough to fill 200 train tank cars.
35. Your heart can keep beating even if it is separated from the body because it has its own electrical impulse.
36. Your brain keeps developing until your late 40s.
37. Our lungs and nasal passages have exquisitely tiny hairs called cilia that can "taste" bitter flavors.
38. When you take one step, you are using up to 200 muscles.
39. The chemical elements that make up your body are worth around US$160.
40. Human fingers can feel objects as small as 13 nanometers. If your finger was the size of the Earth, you would feel the difference between houses and cars.
41. The highest recorded body temperature in a human being was a fever of 115.7°F (46.5°C).
42. The human heart is not on the left-hand side of the body; it's in the middle.
43. Half of your genes describe the complex design of your brain, with the other half describing the organization of the other 98% of your body.
44. Your taste buds are replaced every 10 days.
45. The average age of a human fat cell is 10 years.
46. There is no scientific evidence that shaving or waxing will make your hair come back thicker.
47. If your stomach acid got onto your skin it would burn a hole in it.
48. 1 in 10,000 people has their internal organs reversed or "mirrored" from their normal positions.
49. Without your pinky finger, you would lose about 50% of your hand strength.
50. Your lungs can hold up to 5 minutes worth of oxygen.
51. Scars continue to look the same year after year because, while skin cells are replaced periodically, the underlying collagen is not.
52. The human body emits upwards of 10^6 biological particles per hour, creating a detectible microbial cloud into surrounding indoor air.
53. A nanometre is about as much as your nails grows every second.
54. Men's Testicles hang between the legs to keep cool because sperm dies at body temperature.
55. 1 out of every 200 people have an extra rib.
56. Your mouth is made of the same skin cells as a vagina.
57. Muscle comes from the Latin musculus, which means "little mouse," because a flexed muscle was thought to resemble a mouse.
58. While receiving a single tattoo temporarily weakens your immune system, receiving several tattoos over time could strengthen it.
59. Liars blink less frequently than normal during the lie, and then speed up to around eight times faster than usual afterwards. You spend 10% of your waking life blinking.
60. Some non-redheaded men have red beards because they have one copy of the MC1R gene. Two copies would make them fully redheads.
61. More than 3% of people are born with phonagnosia: they can't recognize the voices of familiar people.
62. A scientist cracked his knuckles on one hand for over 50 years to prove it did not cause Arthritis.
63. Eating too much meat can accelerate your body's biological age.
64. You can burn 20% more fat by exercising in the morning on an empty stomach.
65. Cornflakes have more genes than people do.
66. Humans have no more genes than worms.
67. Our bodies consist of 60 out of 118 confirmed elements in the periodic table or 50.8% of the periodic table.
68. Sex burns 3.6 calories a minute.
69. A strong cough forces air out of the airways at speeds up to 1000 km/h, almost as fast as the speed of sound (1234 km/h).
70. Your brain can recognize a sound 10 times faster than the blink of an eye.
71. It takes about 0.2 seconds for your brain to understand the light that reaches your eye.
72. Bras make breasts sag, according to a French study published in 2013.
73. A woman's vaginal muscles can take up to 6 months to get back to their normal shape and size after childbirth.
74. One prevailing theory as to why butt hair exists is that there's simply no significant evolutionary pressure against butt hair.
75. Hearing is the fastest human sense.
76. A person can recognize a sound in as little as 0.05 seconds.
77. Breastfeeding actually changes the way a mother's brain works, making her more attuned to the child's crying.
78. Ancient Greeks investigated animal structure and described the difference between arteries and veins around 500 BCE.
79. The cost of sequencing a human genome went from US$100 million in 2007 to about US$3,000 in 2012.
80. It takes about 0.2 seconds for your brain to recognize something touching your hand or foot.
81. We can't digest grass because our bodies don't have what it takes to break down the cellulose found in the plant.
82. A study found that right-handed individuals have better oral hygiene and the lower incidence of caries because of their better manual dexterity and brush efficiency.
83. The big toe carries the most weight of all the toes, bearing about 40% of the load.
84. To enlist in the U.S. army, you have to have all ten of your toes intact.
85. Until the Renaissance, understanding of human anatomy was based on the dissection of animals, with human autopsies considered an affront in virtually all cultures.
86. Inner speech can clock in at 4,000 words per minute, 10X faster than verbal speech.
87. Some people never develop fingerprints.
88. Beer and vaginas have almost the same acidity levels, with an average pH of 4.5.
89. The iron in our blood and the calcium in our bones come from ancient explosions of giant stars.
90. Borborygmus is the scientific name for when your stomach growls.
91. A transplanted great toe decreases in size up to one third when transplanted to the hand.
92. Your hair contains traces of gold.
93. Skulls are like fingerprints. Frontal sinus print is found to be unique to a particular individual.
94. Oxford University discovered if someone prods one of your middle toes while your eyes are shut, most people can't tell which toe is being touched.
95. 80% of what we learn is through our eyes.
96. Eating garlic improves your body odour.
97. You don't gain and lose fat as your weight fluctuates. Your fat cells just bigger or smaller.
98. Only one out of every two billion people will live to be 116 years old.
99. If you’re a female and you feel like your heart beats quicker than your male counterparts, you’re not wrong. Women’s hearts are proven to beat faster than men’s.
100. Around 70% of people tilt their heads to the right rather than the left when kissing somebody else.
Preview photo credit: nationalgeographic.org