When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
One cubic foot of gold weighs more than 1,200 pounds!
78
Indoor pollution is 10 times more toxic than outdoor pollution.
62
German chemists made a replica of a trophy the size of one molecule.
68
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
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
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17