You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Your thumb is about the same size as your nose.
124
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127