The male fetus is capable of attaining an erection during the last trimester.
75
Ingrown toenails are hereditary.
15
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Enamel is hardest substance in the human body.
61
According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
You have no sense of smell when you're sleeping!
72
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
One quarter of the bones in your body are in your feet!
36