Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Pumice is the only rock that floats on water.
14
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Cold water weighs more than hot water.
93
Billions of neutrinos pass unnoticed through your body every second.
6
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
One barrel of petroleum holds 42 gallons.
20