The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Balsa wood is classified as a hard wood!
41
Out of all the senses, smell is most closely linked to memory.
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