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230 million-year-old dinosaur is oldest ever discovered in North America — and changes what we know about how they conquered Earth

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A 230 million -year-old, never-before-seen raptor unearthed in the U.S. is the oldest dinosaur ever discovered in North America .

The discovery has shocked paleontologists, who previously assumed that no dinosaurs existed in the Northern Hemisphere at this time.

The shape of the leg bones suggests that A. bahndooiveche was an extremely distant ancestor of sauropods.