Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One cubic foot of gold weighs more than 1,200 pounds!
78
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
In zero gravity, a candle's flame is round and blue.
16
Research indicates that plants grow healthier when they are stroked.
173