4.5 pounds of sunlight strike the Earth each day.
27
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Iron weighs more after it rusts.
68
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
If the chemical sodium is dropped into water it will immediately and violently explode.
67
