Accounting for oxygen in modeling coastal ecosystems

Driven by climate change and pollution, the decline of oxygen levels in oceans is altering biogeochemical cycles, threatening marine plants, animals and ecosystems. But how accurately are we projecting the fate of marine ...

Scientists rediscover small Brazil tree, 185 years on

A species of small holly tree that was last seen nearly two centuries ago and was feared extinct has been rediscovered pluckily clinging to life in an urban area in northeastern Brazil, scientists said Tuesday.

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