Research indicates that plants grow healthier when they are stroked.
173
Most dust particles in your house come from dead skin.
48
If the chemical sodium is dropped into water it will immediately and violently explode.
67
A cubic yard of air weighs about 2 pounds at sea level.
31
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
German chemists made a replica of a trophy the size of one molecule.
68
Cold water weighs more than hot water.
93