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@AnaxoSmithKline Closing of the Panama isthmus also happened around the same time & this would have offset oceanic circulation by quite a lot (weakened Gulf current, no longer connected to the Pacific) https://t.co/UOHTpgKqdW
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A few years back, some of the geologists working in Colombia and Panama proposed that something resembling today's Isthmus had formed by 13 to 15 million years ago. This prompted much grumpiness among other geologists, paleontologists, and biologists: htt
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RT @odealab: @PablusPueblus That's right @pabluspueblus - video captured by Collin McMillan and published in the supplementary info of this…
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Not at all my area of expertise, but as far as I know, the consensus is still strongly in favour of the Isthmus of Panama forming properly ca. 3 million years ago. [Actual experts, feel free to bringing me up to speed if I've missed a major shift.] https:/