A fetus develops fingerprints at eighteen weeks!
32
The male fetus is capable of attaining an erection during the last trimester.
75
The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193
Ingrown toenails are hereditary.
15
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
Fingernails grow nearly 4 times faster than toenails.
31