Hot water can freeze faster than cold water.
181
Out of all the senses, smell is most closely linked to memory.
146
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
For every gallon of sea water, you get more than a quarter pound of salt.
45
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The average home creates more pollution than does the average car.
33
Sound at the right vibration can bore holes through a solid object.
134