Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Your heart will pump about 212 million liters in its lifetime.
26
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
By weight, Bone is five times stronger than steel.
417
The human brain is more active during sleep than during the day.
28
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132