The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average sperm cell swims at 8 inches per hour.
4
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
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18