What if dinosaurs hadn't died out?

But what if history had taken a different course? What if the asteroid had missed or arrived a few minutes earlier? That is the scenario suggested by researchers featured in The Day the Dinosaurs Died, a recent BBC documentary. These scientists – including geologist Sean Gulick of the University of Texas – argue that if the asteroid had arrived mere moments earlier or later, rather than hitting the shallow waters of Mexico’s Yucatan Peninsula, it would have plunged into the deep sea of the Pacific or Atlantic oceans, absorbing some of the force and limiting the expulsion of sulphur-rich sediments that choked the atmosphere for the months or years ahead.

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Had that been the case, there would still have been a catastrophe and extinctions, but some larger dinosaurs may have survived. Pondering the course of this alternative timeline is an intriguing thought experiment that dinosaur scientists are only too enthusiastic to speculate about. Would dinosaurs be here today? What new dinosaurs might have appeared? Would dinosaurs have developed human-like intelligence? Would mammals have remained in the shadows? Would humans have evolved and – as depicted in Disney’s 2015 film The Good Dinosaur – found a way to survive alongside them?

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