Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
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
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Most dust particles in your house are made from dead skin!
67
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65