A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Iron weighs more after it rusts.
16
Decaffeinated coffee is not 100% caffeine free. When coffee is being decaffeinated, 2% of the caffeine still remains in it.
59
Standard paper cannot be folded in half more than 7 times.
232