One 75-watt bulb gives more light than three 25-watt bulbs.
57
The bark of an older redwood tree is fireproof.
65
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
The average temperature at 40,000 feet above sea level is -60 F.
56
Most dust particles in your house are made from dead skin!
67
The only letter not appearing on the Periodic Table is the letter "J".
180
Most dust particles in your house come from dead skin.
48