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Steep oxygen decline halted first land colonization by Earth's sea creatures

...llion years ago. That was during one of the lowest ebbs of atmospheric oxygen content of the last 500 million years, but he speculates that it took some time, until oxygen levels rose appreciably, before dinosaurs grew to their familiar gargantuan sizes. "Dinosaurs thrived and nothing else did. There's...

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(Date:7/11/2014)... from the Max Planck Institute for Medical Research in ... understanding photosynthesis, the process by which the Earth first ... and which is therefore crucial for all higher forms ... the first direct visualization of a crucial event in ... specific protein complex, photosystem II, splits water into hydrogen ...
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