Balsa wood is classified as a hard wood!
41
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Scientists aren't sure what color dinosaurs were.
312
The force of a suction cup is calculated using F=AP.
15
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
A cesium atom in an atomic clock beats over nine billion times a second.
43
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61