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
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Iron weighs more after it rusts.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Sound travels about 4 times faster in water than in air.
408