A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Research indicates that plants grow healthier when they are stroked.
173
Pure water (H2O) does not conduct electricity on its own.
46
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
The bark of an older redwood tree is fireproof.
65
Indoor pollution is 10 times more toxic than outdoor pollution.
62
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310