Iron weighs more after it rusts.
16
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
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
No matter how cold it gets, gasoline will not freeze.
107