Flu shots only work about 70% of the time.
18
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 tastebud lives only 10 days before it dies and is replaced by a new one.
15
The heart pumps about 1 million barrels of blood during an average lifetime!
30
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Men have larger hearts; women's hearts beat faster.
77
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145