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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
For every gallon of sea water, you get more than a quarter pound of salt.
45
Scientists aren't sure what color dinosaurs were.
312
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Nylon is made from coal and petroleum.
42