Most dust particles in your house come from dead skin.
48
The only letter not appearing on the Periodic Table is the letter "J".
180
One barrel of petroleum holds 42 gallons.
20
One ragweed plant can release as many as one billion grains of pollen!
51
The bark of an older redwood tree is fireproof.
65
Hot water can freeze faster than cold water.
181
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20