The smell of freshly cut grass is actually a plant distress call.
31
The bark of an older redwood tree is fireproof.
65
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
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
Scientists aren't sure what color dinosaurs were.
312
The force of a suction cup is calculated using F=AP.
15