Aluminum used to be more valuable than gold!
84
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The bark of an older redwood tree is fireproof.
65
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
German chemists made a replica of a trophy the size of one molecule.
68
Cold water weighs more than hot water.
93
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
4.5 pounds of sunlight strike the Earth each day.
27