Monday, April 4, 2011

Interesting Fact of the Day

An interest article in Fortune about the Earth's core and relationships of the planet's interior layers to earthquakes. I never knew that based on current readings in deep mines and boreholes that the internal heat of the earth rises incredible sharply with depth, reaching an estimated 2,500° Fahrenheit only fifty miles down.

If so much heat is internally generated, how did earth manage to go through a phase called 'snowball earth' when our entire planet was a sheet of ice millions of years ago... we are not talking the recent ice-age, but an ice-age so immense that the entire earth and oceans were under a sheet of ice miles thick..

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