Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Most dust particles in your house come from dead skin.
48
Sound at the right vibration can bore holes through a solid object.
134
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A cesium atom in an atomic clock beats over nine billion times a second.
43
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The average home creates more pollution than does the average car.
33