Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
One cubic foot of gold weighs more than 1,200 pounds!
78
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Iron weighs more after it rusts.
68
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
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