In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Most dust particles in your house come from dead skin.
48
Scientists aren't sure what color dinosaurs were.
312
The average temperature at 40,000 feet above sea level is -60 F.
56
Iron weighs more after it rusts.
68
The sun is 330,330 times larger than the earth.
75
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
If the chemical sodium is dropped into water it will immediately and violently explode.
67