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
The average person's skin weighs twice as much as their brain.
131
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human body contains over a billion miles of DNA.
147
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62