4.5 pounds of sunlight strike the Earth each day.
27
Out of all the senses, smell is most closely linked to memory.
146
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Sound travels about 4 times faster in water than in air.
408
One ragweed plant can release as many as one billion grains of pollen!
51
For every gallon of sea water, you get more than a quarter pound of salt.
45
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61