Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Nearly 50% of the world's scientists are assigned to military projects.
71