Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
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
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Nylon is made from coal and petroleum.
42
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5