The average temperature at 40,000 feet above sea level is -60 F.
56
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
Balsa wood is classified as a hard wood!
41
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
The smell of freshly cut grass is actually a plant distress call.
31
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sound travels fifteen times faster through steel than through air.
134
No matter how cold it gets, gasoline will not freeze.
107