Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Pumice is the only rock that floats on water.
14
Balsa wood is classified as a hard wood!
41
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17