Your heart will pump about 212 million liters in its lifetime.
26
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
A person can live without food for about a month, but only about a week without water.
156
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99