One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
One ragweed plant can release as many as one billion grains of pollen!
51
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Sound at the right vibration can bore holes through a solid object.
134
Nylon is made from coal and petroleum.
42
Hot water can freeze faster than cold water.
181
