The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Pain occurs when sounds are above 130 db.
124
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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