Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
A ball of glass will bounce higher than a ball made of rubber.
73
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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
