Scientists aren't sure what color dinosaurs were.
312
Balsa wood is classified as a hard wood!
41
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
A cesium atom in an atomic clock beats over nine billion times a second.
43
Sound travels fifteen times faster through steel than through air.
134
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
Each day, up to 150 species of life become extinct.
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