Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
For every gallon of sea water, you get more than a quarter pound of salt.
45
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Pure water (H2O) does not conduct electricity on its own.
46
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Out of all the senses, smell is most closely linked to memory.
146