The smell of freshly cut grass is actually a plant distress call.
31
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
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
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Nearly 50% of the world's scientists are assigned to military projects.
71
4.5 pounds of sunlight strike the Earth each day.
27
The average home creates more pollution than does the average car.
33