Iron weighs more after it rusts.
16
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
If you get water flowing fast enough, it can cut metal.
354
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
It 'snows' metal on Venus.
13
If two pieces of metal touch in space, they become permanently stuck together.
808
Brass doorknobs automatically disinfect themselves in about 8 hours.
18