Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
Nearly 50% of the world's scientists are assigned to military projects.
71
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65