It takes about 20 seconds for a red blood cell to circle the whole body.
102
Your body is creating and killing about 2.4 million red blood cells per second.
17
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
One quarter of the bones in your body are in your feet!
36
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
Wearing tight pants can lead to impotence in men.
120
A woman's sense of smell is most sensitive during ovulation.
34
The human brain is insensitive to pain.
76