In zero gravity, a candle's flame is round and blue.
16
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
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Nylon is made from coal and petroleum.
42
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16