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
Pumice is the only rock that floats on water.
14
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Iron weighs more after it rusts.
16
Each day, up to 150 species of life become extinct.
-23
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65