The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
"Fish odor syndrome" is a rare genetic disorder that causes people to smell like rotten fish.
5
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
Only 1% of bacteria cause disease.
45
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 levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Ingrown toenails are hereditary.
15