Redheads require more anesthesia to 'go under' than other hair colors do.
51
We are born with 350 bones, and die with 206.
135
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
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
Within three days of death, the enzymes that once digested your food begin to eat you.
22
Deep Breathing gives you health benefits similar to aerobics.
39
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