A person can live without food for about a month, but only about a week without water.
156
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Fingernails grow nearly 4 times faster than toenails.
31
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
When you take a step, you are using up to 200 muscles.
885