Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Hot water can freeze faster than cold water.
181