Nearly 80 percent of all sudden cardiac arrests happen at home.
7
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
Midgets and dwarfs almost always have normal sized children.
54
Enamel is hardest substance in the human body.
61
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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 average sperm cell swims at 8 inches per hour.
76