Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
12
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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 ball of glass will bounce higher than a ball made of rubber.
73
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Cold water weighs more than hot water.
93
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17