Pain travels through your body at 350 ft. per second.
36
In older people, memory is best early in the morning and then declines during the late afternoon.
33
Redheads require up to 20% more anesthesia to be knocked out.
112
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
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
There are about 1,400 different species of bacteria in your belly button.
10
The average human body contains enough iron to make a small nail.
50
