One ragweed plant can release as many as one billion grains of pollen!
51
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Cold water weighs more than hot water.
93
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
One 75-watt bulb gives more light than three 25-watt bulbs.
57
A cubic yard of air weighs about 2 pounds at sea level.
31
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Pumice is the only rock that floats on water.
14