8. Your bones are 4 times stronger than concrete and about as strong as granite. When concentrated into the size of a matchbox, our bones can support 9 tons of weight.
9. We produce about 25 million new cells each second! But they are so small, that 10,000 of our cells would fit into the head of a pin.
10. However, about 90% of the cells that make up our body aren’t human at all, but fungi and bacteria.
11. You actually have gold inside your body! Every person has around0.2 milligrams of gold inside them, mostly in micro particles in their blood. But it would take about 40,000 people to amass enough gold for a single 8g coin.
12. Every person on the planet has their own unique sense of smell…except twins, who can share almost identical senses.
13. You are shorter at night than you are in the morning by about 1cm, as the cartilage in your spine slowly compresses under the weight of gravity during the day.
14. You may think that body odor is caused by sweat, but that’s only half true. By itself, sweat doesn’t smell bad, but when bacteria on your skin feed on it, the waste product is what leaves a foul smell.
2. Our brains have the potential to read up to 1,000 words per minute, with 85% comprehension. However, the average person reads only about 200 words per minute, with a lackluster 60% comprehension.
3. The human eye can actually see ultraviolet light, but light on that spectrum is filtered out by the ocular lens. However, some people have undergone surgery to remove that filter, making ultraviolet light visible.
4. The body of an adult is made up 7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms. To put that number in context, our galaxy is made up of “only” 300,000,000,000 (300 billion) stars.
5. And those atoms are the same ones that formed during the Big Bang 13.7 billion years ago, as matter is neither created nor destroyed but recirculated.
6. Have you ever noticed that it’s impossible to tickly yourself, even for the most ticklish among us?
16. If you dream often and deeply, it probably means you have a higher IQ.
17. Human adults have far fewer bones than babies. How is that possible? Babies are born with about 350 bones, but as bones fuse together during natural growth, the mature adults end up with only 206 bones.
18. Nerve impulses travel to and from our brains at up to 250mph, faster than the average racecar.
19. Every thirty minutes, our bodies give off enough heat to boil a gallon of water.
20. Our pets aren’t the only ones that shed; human beings shed skin at a rate of about 600,000 particles every hour, completely replacing our epidermis in one month. That means we shed 1.5 pounds of skin every year, or 105 pounds by the age of 70.
21. Human beings can go weeks without food and days without water before they succumb, but most people don’t know that eleven days without sleep and your body will completely shut down and you’ll die of shock, as well.
23. Human beings have always been the best long distance runners on the planet save for a few animals. That, along with critical thinking, was our evolutionary advantage, as we would migrate long distances to chase food, escape cold weather, or flee predators.
24. Our brains perform an awe-inspiring 38 thousand trillion operations per second. By comparison, BlueGene, the world’s most powerful supercomputer, can operate at only .02% of that capacity.
25. The human brain also uses about 20% of our total oxygen and caloric intake, despite being only about 2% of our body mass.
26. Did you know that we actually glow in the dark? In fact, the human body is bioluminescent, which means it emits its own light even in total darkness. However, that light is so feint, it’s about 1,000 times weaker than the human eye can detect.
28. Every three or four days, our stomachs form a completely new lining. Why is that necessary? Thanks to the strong acids that digest our food, our stomachs have to produce new cells faster than they are destroyed, or else our stomachs would literally digest themselves!
29. Do you crack your knuckles? That sound, or that of your back, neck, ankles, or knees cracking, is actually not bone, but bubbles popping in the joints’ fluid. It may not as harmful as our mothers told us, but doing it too much can damage the ligaments that surround those joints.
30. Our muscles are exponentially stronger and more powerful than we use on a daily basis. In fact, our strength is limited to protect the tendons and muscles from injury. But when someone experiences an extreme adrenaline rush, that near-superhuman strength can be accessed, like when someone lifts a car off of a loved one after an accident.
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