A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
A cubic yard of air weighs about 2 pounds at sea level.
31
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
4.5 pounds of sunlight strike the Earth each day.
27