Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
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
A cesium atom in an atomic clock beats over nine billion times a second.
43
Sound travels about 4 times faster in water than in air.
408
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Billions of neutrinos pass unnoticed through your body every second.
6
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
One cubic foot of gold weighs more than 1,200 pounds!
78