Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
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
Pain travels through your body at 350 ft. per second.
36
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
The smallest human penis ever recorded was just 5/8 of an inch long!
77
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
If you cut a 'V' shape into your toe nails, you can prevent 'in-grown' toe nails.
22