Iron weighs more after it rusts.
16
One barrel of petroleum holds 42 gallons.
20
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
German chemists made a replica of a trophy the size of one molecule.
68