In zero gravity, a candle's flame is round and blue.
16
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
Sound travels fifteen times faster through steel than through air.
134
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116