Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Sound travels fifteen times faster through steel than through air.
134
Pumice is the only rock that floats on water.
14
Aluminum used to be more valuable than gold!
84
Cold water weighs more than hot water.
93
One cubic foot of gold weighs more than 1,200 pounds!
78
A cubic yard of air weighs about 2 pounds at sea level.
31
Iron weighs more after it rusts.
68