The only letter not appearing on the Periodic Table is the letter "J".
180
Balsa wood is classified as a hard wood!
41
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
One ragweed plant can release as many as one billion grains of pollen!
51
Indoor pollution is 10 times more toxic than outdoor pollution.
62