Plate tectonics started over 4 billion years ago, geochemists report

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A new picture of the early Earth is emerging, including the surprising finding that plate tectonics may have started more than 4 billion years ago — much earlier than scientists had believed.

Two UCLA students named Rhodes Scholars for 2009

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A UCLA senior and a recent graduate have been chosen as winners of prestigious Rhodes Scholarships, the oldest and best known award for international study.