Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Out of all the senses, smell is most closely linked to memory.
146
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Nearly 50% of the world's scientists are assigned to military projects.
71
Iron weighs more after it rusts.
16