Fingernails grow nearly 4 times faster than toenails.
31
Redheads require more anesthesia to 'go under' than other hair colors do.
50
Your heart will pump about 212 million liters in its lifetime.
26
The chemicals indole and skatole, which help to account for the particular smell of human feces, are used as ingredients in perfume!
-3
The human brain is insensitive to pain.
76
The male fetus is capable of attaining an erection during the last trimester.
75
Your heart rate can rise as much as 30% during a yawn.
69
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190