The human sigh acts as a physiological reset button.
23
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
There's 100 trillion good bacteria living in your body.
17
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
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 average sperm cell swims at 8 inches per hour.
76
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199