Pumice is the only rock that floats on water.
14
Out of all the senses, smell is most closely linked to memory.
146
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
No matter how cold it gets, gasoline will not freeze.
107
One third of the electricity produced on earth is used to power electric light bulbs!
75