Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Pumice is the only rock that floats on water.
14
One barrel of petroleum holds 42 gallons.
20
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Scientists aren't sure what color dinosaurs were.
312
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17