Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Pure water (H2O) does not conduct electricity on its own.
46
Sound travels about 4 times faster in water than in air.
408
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101