Pumice is the only rock that floats on water.
14
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
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
In zero gravity, a candle's flame is round and blue.
16
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108