One cubic foot of gold weighs more than 1,200 pounds!
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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.
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Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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Neanderthal man had a brain capacity 100cc larger than modern man's.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Iron weighs more after it rusts.
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Nearly 50% of the world's scientists are assigned to military projects.
71