Sound travels about 4 times faster in water than in air.
408
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Scientists aren't sure what color dinosaurs were.
312
4.5 pounds of sunlight strike the Earth each day.
27
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
Nylon is made from coal and petroleum.
42
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