Sound at the right vibration can bore holes through a solid object.
134
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
A cubic yard of air weighs about 2 pounds at sea level.
31