One ragweed plant can release as many as one billion grains of pollen!
51
Sound travels fifteen times faster through steel than through air.
134
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The earth is approx. 6,588,000,000,000,000,000 tons.
175
A cubic yard of air weighs about 2 pounds at sea level.
31
German chemists made a replica of a trophy the size of one molecule.
68
Nearly 50% of the world's scientists are assigned to military projects.
71
4.5 pounds of sunlight strike the Earth each day.
27