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Plate Tectonics

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Earth's Youthful, One-Billion-Year Rampage - Michael Marshall, NewSci.

Our planet has calmed down in its middle age. Earth was at its most active 1.1 billion years ago, when all the continents collided into one huge supercontinent, and has been getting...

Rocks Re-Emerge After 2.5 B Yrs in Mantle - Jessica Griggs, NewScientist

JULES VERNE's characters would never have stuck it out this long. Volcanic rocks found in the south Pacific spent at least 2.45 billion years on a journey into Earth's interior – and...

How Were America's Mountain Ranges Built? - Alexandra Witze, Nature

Peering deep below North America at buried rock slabs, geophysicists are rewriting the ancient history of the continent's western edge.

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