Top ten facts about humans
1. The sound of cracking joints is made by bubbles popping in joint fluid
2. If you spread your brain out, it would be the size of a pillowcase
3. You produce about 6 cups of saliva a day
4. If the earth were flat, you could spot a candle 30 miles away
5. When you blush, the lining of your stomach blushes too
6.humans are the longest long distance runners on the planet
7. Your body share 50% of their DNA with bananas
8. Humans shed about 40 pounds of skin in their lifetime
9. There is 0.2 milligrams of gold because of our blood
10. For every pound gained, your body creates 7 miles of new blood vessels
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