Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Out of all the senses, smell is most closely linked to memory.
146
Sound travels about 4 times faster in water than in air.
408
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The earth is approx. 6,588,000,000,000,000,000 tons.
175
For every gallon of sea water, you get more than a quarter pound of salt.
45
One ragweed plant can release as many as one billion grains of pollen!
51