Iron weighs more after it rusts.
68
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79