For every gallon of sea water, you get more than a quarter pound of salt.
45
The bark of an older redwood tree is fireproof.
65
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Research indicates that plants grow healthier when they are stroked.
173
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75