Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Each day, up to 150 species of life become extinct.
-23
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
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5