Balsa wood is classified as a hard wood!
41
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels fifteen times faster through steel than through air.
134
One ragweed plant can release as many as one billion grains of pollen!
51
Most dust particles in your house come from dead skin.
48
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79