Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Iron weighs more after it rusts.
16
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
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16