If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The average sperm cell swims at 8 inches per hour.
76
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
You see your nose at all times, your brain just chooses to ignore it.
30
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197