Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
In zero gravity, a candle's flame is round and blue.
16
The only letter not appearing on the Periodic Table is the letter "J".
180
The smell of freshly cut grass is actually a plant distress call.
31
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11