A cesium atom in an atomic clock beats over nine billion times a second.
43
Pumice is the only rock that floats on water.
14
Iron weighs more after it rusts.
68
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
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
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