Report: Hot Rocks Keep N. America Afloat

June 26, 2007 By PAUL FOY, Associated Press Writer Earth's Inner Heat Keeps Cities Afloat (AP)

Graphic shows different heat zones under North America; 2c x 3 1/2 inches; 96.3 mm x 88.9 mm

(AP) -- If it weren't for the hot rocks down below Earth's crust, most of North America would be below sea level, report researchers who say the significance of Earth's internal heat has been overlooked.

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