4.5 pounds of sunlight strike the Earth each day.
27
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The only letter not appearing on the Periodic Table is the letter "J".
180
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
The bark of an older redwood tree is fireproof.
65
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13