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A natural protection racket among damselfish and mysid shrimp

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« Rich nations see virus rates fall quicker -- study

A hovering, rocket-powered Skycrane will lower Perseverance to Mars' surface today. And although NASA once considered the idea too wild, eventually, former NASA administrator Mike Griffin said, “I still think it’s crazy, but it might be crazy enough to work. It might be the right kind of crazy.” »