Iron weighs more after it rusts.
16
For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels about 4 times faster in water than in air.
408
Aluminum used to be more valuable than gold!
84
Balsa wood is classified as a hard wood!
41
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44