Your heart pumps about 2,000 gallons of blood each day!
53
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
It is almost impossible to sneeze with your eyes open. It is a defense mechanism that has evolved to protect our eyes from bacteria and debris.
164
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
If you unfolded your brain, it would cover an ironing board.
42
If you stop working out, it takes twice as long to lose strength than it took to gain it.
16