The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
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
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Most dust particles in your house come from dead skin.
48
Research indicates that plants grow healthier when they are stroked.
173
