Sound travels fifteen times faster through steel than through air.
134
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
4.5 pounds of sunlight strike the Earth each day.
27
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Cold water weighs more than hot water.
93
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117