The earth is approx. 6,588,000,000,000,000,000 tons.
175
The average home creates more pollution than does the average car.
33
Pure water (H2O) does not conduct electricity on its own.
46
Iron weighs more after it rusts.
16
Pumice is the only rock that floats on water.
14
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
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