Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Research indicates that plants grow healthier when they are stroked.
173
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Iron weighs more after it rusts.
68
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The average temperature at 40,000 feet above sea level is -60 F.
56
The force of a suction cup is calculated using F=AP.
15