The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Enamel is hardest substance in the human body.
61
The human brain doesn't stop developing until about 25 years old.
102
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
Your thumb is about the same size as your nose.
124
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217