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
Flu shots only work about 70% of the time.
18
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
In Japan, condoms are commonly sold 'door to door'!
54
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
Nearly 80 percent of all sudden cardiac arrests happen at home.
7
More people have a phobia of frogs than rats.
41