The first patented condom was meant to be reused!
47
The human sigh acts as a physiological reset button.
23
Redheads require up to 20% more anesthesia to be knocked out.
112
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
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
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
Banging your head against a wall uses 150 calories an hour.
57
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12