Iron weighs more after it rusts.
68
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
One barrel of petroleum holds 42 gallons.
20
Balsa wood is classified as a hard wood!
41
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65