Evidence that the Earth’s crust began as an unbroken shell raises a question: Can we really understand the past by looking at how things are now?
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What's left on our science to-do list before the Mayan doomsday arrives
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Aggregation of news and blog coverage of the 3/11/2011 earthquake and tsunami in Japan
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A program that rewards recyclers is growing, even in a state that once boasted some of the highest recycling rates.