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An ancient whale ancestor
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Evolution of Whales Animation

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One of the most impressive photosynthesizers is a cyanobacterium called Prochlorococcus. It is estimated to be more abundant than any other photosynthesizer on the planet, and to be responsible for producing 20 percent of the oxygen in the atmosphere.
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Meet the obscure microbe that influences climate, ocean ecosystems, and perhaps even evolution

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A screenshot from the video showing a fiddler crab with a large claw.
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Claws Out: Fiddler Crabs Do Battle

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