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flag Scientists propose dinosaurs originated in today's Amazon and Sahara, challenging earlier theories.

flag Researchers now suggest dinosaurs originated in hot, dry regions near the equator, in areas of Gondwana that are today the Amazon and Sahara. flag This challenges the previous belief that dinosaurs first appeared further south. flag The study, published in Current Biology and based on computer models and fossils, indicates dinosaurs may have evolved in harsh, dry environments and later diversified due to volcanic events that wiped out competitors.

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