Pumice is the only rock that floats on water.
14
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Pure water (H2O) does not conduct electricity on its own.
46
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 Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
A ball of glass will bounce higher than a ball made of rubber.
73
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61