Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One ragweed plant can release as many as one billion grains of pollen!
51
The force of a suction cup is calculated using F=AP.
15
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Scientists aren't sure what color dinosaurs were.
312
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
For every gallon of sea water, you get more than a quarter pound of salt.
45