The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Iron weighs more after it rusts.
68
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Sound at the right vibration can bore holes through a solid object.
134
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7