Nearly 50% of the world's scientists are assigned to military projects.
71
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
A cubic yard of air weighs about 2 pounds at sea level.
31
A ball of glass will bounce higher than a ball made of rubber.
73
The bark of an older redwood tree is fireproof.
65
The average home creates more pollution than does the average car.
33