Physics Facts & Trivia
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The mass of our entire atmosphere is estimated to be some 5.5 quadrillion tons (55 followed by 14 zeros). Chewing gum was invented by a dentist, named William Semple - as a way to exercise your jaws. The diameter of a proton is approximately 0.000000000001 mm (1/25,000,000,000,000 inch).
The amount of water beneath our ground soil is 50 times as much as all the water in the rivers and lakes combined. The first ten feet of the ocean hold as much heat as the Earth's entire atmosphere.
On average, our bodies constantly resist an atmospheric pressure of about 1 kilogram per square inch.
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The Dead Sea is so dense with salt, you can easily float on it without drowning. 
Lake Baikal in 
The world's densest wood, the Black Ironwood (Olea laurifolia), does not float on water and therefore sinks. 
You can convert graphite into diamond by applying a temperature of 3000 Celsius and pressure of 100,000 atm. 
The lightning bolt is 3 times hotter than the sun. 
The deepest location on Earth is Mariana Trench, about 11km deep in the North Pacific ocean. 