Surprising Facts About Humans
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Fun Facts About Humans Humans are the only species that blush. This involuntary
response happens when we feel embarrassed or ashamed, and scientists believe it evolved as a
way to show others we recognize our social mistakes. Even more fascinating, we lose bone density
in space. Astronauts can lose up to two percent of their bone mass per month in zero
gravity. Back on Earth, humans are incredibly resilient. We can survive without
food for about three weeks, but only three to four days without water.
And get this, your brain uses twenty percent of your body's total energy despite being
only two percent of your body weight. Perhaps most mind blowing, every human spent
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