Yawns are more contagious among people with closer relationships.
163
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
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Your body is creating and killing about 2.4 million red blood cells per second.
17