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A new twist in an old origin story: Earliest dinosaurs may have emerged in the Amazonspreading to southern Gondwana and to Laurasia, the adjacent northern supercontinent that later split into Europe, Asia and North America. Support for this origin comes from the fact it is a ...
Laurasia, the northern half, broke up into North America and Eurasia. Gondwana, the southern half, began to break up by the mid-Jurassic. The eastern portion—Antarctica, Madagascar, India ...
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