Sound travels fifteen times faster through steel than through air.
134
The only letter not appearing on the Periodic Table is the letter "J".
180
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
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
According to studies, men change their minds two to three times more often than women.
72