Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One ragweed plant can release as many as one billion grains of pollen!
51
The average temperature at 40,000 feet above sea level is -60 F.
56
The average home creates more pollution than does the average car.
33
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
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
The earth is approx. 6,588,000,000,000,000,000 tons.
175