Surprising Facts About Humans

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