The average sperm cell swims at 8 inches per hour.
76
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Sex burns about 360 calories per hour.
861
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
When you get blackout drunk, you don't actually forget anything; your brain wasn't "recording" in the first place.
23
In older people, memory is best early in the morning and then declines during the late afternoon.
33
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
