Florida has alot of air pockets underneath the ground. I've watched a documentary on the weather channel before. Air pockets below the ground slowly erode and eventually open up at the top layer of the ground, causing the earth to open up.
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After World War 2, The late 40s to mid 50s saw a huge rise in baby population also known as baby boomers
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Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.
Sound wave is a pressure caused by the vibration of something in a medium that transfers anergy, like air.
Greater, earths core is very hot and pressured.
The more you go down, the greater pressure and heat there is.
