High rainfall helped the survival of equatorial rainforests at a time when Earth was globally warm and atmospheric carbon dioxide concentration was a whopping more than 1000 ppmv, around 50 million years ago.The mechanism in which biota survives adverse conditions is still poorly known. The existing palaeoclimate data of mid- and high latitudes suggest large fluctuations in rainfall at around 50 million years ago. However, the quantification of terrestrial palaeoclimate data from the equatorial ...

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