Nearly 50% of the world's scientists are assigned to military projects.
71
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A cesium atom in an atomic clock beats over nine billion times a second.
43
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Sound at the right vibration can bore holes through a solid object.
134
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65