The bark of an older redwood tree is fireproof.
65
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Each day, up to 150 species of life become extinct.
-23
The only letter not appearing on the Periodic Table is the letter "J".
180