Aluminum used to be more valuable than gold!
84
Iron weighs more after it rusts.
68
Most dust particles in your house come from dead skin.
48
For every gallon of sea water, you get more than a quarter pound of salt.
45
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Most dust particles in your house are made from dead skin!
67
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310