Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Iron weighs more after it rusts.
16
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101