スミソニアンマガジン 古代の北米の哺乳類はメキシコに集まり、そこで多様化してから南米へ移動し、そこで繁栄する準備を整えた可能性がある www.smithsonianmag.com/smart-news/a...
Ancient North American Mammals May Have Gathered in Mexico and Diversified Before Moving to South America, Priming Them to Thrive There
An analysis of fossils from the country hints that animals from the north stayed in a "holding pen" between seven million and ten million years ago. The timeline might help explain why so many South A...
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