Iron weighs more after it rusts.
68
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
A cubic yard of air weighs about 2 pounds at sea level.
31
Sound travels fifteen times faster through steel than through air.
134
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Your brain is 80% water.
525
The storage capacity of human brain exceeds 4 Terrabytes.
140