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Atomic clocks are the world’s most precise timekeepers. Based on periodic transitions between two electronic states of an atom, they can track the passage of time with a precision as high as one part ...
Racing the Clock: Rapid Climate Change Forces Scientists to Evaluate Extreme Conservation Strategies（图）
Clock Climate Change Scientists Extreme Conservation Strategies
2009/5/27
Scientists are, for the first time, objectively evaluating ways to help species adapt to rapid climate change and other environmental threats via strategies that were considered too radical for seriou...