Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Scientists are now able to grow 'beating' heart tissue in a lab!
162
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
One ragweed plant can release as many as one billion grains of pollen!
51
A ball of glass will bounce higher than a ball made of rubber.
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