Nearly 50% of the world's scientists are assigned to military projects.
71
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Iron weighs more after it rusts.
68
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Research indicates that plants grow healthier when they are stroked.
173