The human sigh acts as a physiological reset button.
23
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
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
Your heart will pump about 212 million liters in its lifetime.
26
Within three days of death, the enzymes that once digested your food begin to eat you.
22
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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127