Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
German chemists made a replica of a trophy the size of one molecule.
68
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51