Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Liquid TIDE laundry detergent glows under a blacklight.
96
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Iron weighs more after it rusts.
16
The smell of freshly cut grass is actually a plant distress call.
31
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