The Earth's atmosphere weighs about 5.5 quadrillion tons.
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The only letter not appearing on the Periodic Table is the letter "J".
180
According to studies, men change their minds two to three times more often than women.
72
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
One cubic foot of gold weighs more than 1,200 pounds!
78
The force of a suction cup is calculated using F=AP.
15