In zero gravity, a candle's flame is round and blue.
16
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Most dust particles in your house come from dead skin.
48
Diamonds can be shattered with a hammer.
-104
Indoor pollution is 10 times more toxic than outdoor pollution.
62