Out of all the senses, smell is most closely linked to memory.
146
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
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
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
The average temperature at 40,000 feet above sea level is -60 F.
56
Liquid TIDE laundry detergent glows under a blacklight.
96
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310