Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A cesium atom in an atomic clock beats over nine billion times a second.
43
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Sound travels fifteen times faster through steel than through air.
134
The average temperature at 40,000 feet above sea level is -60 F.
56
The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
7
The earth is approx. 6,588,000,000,000,000,000 tons.
175