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What Killed the Dinosaurs in Utah’s Giant Jurassic Death Pit?

smithsonianmag.com

Utah is dinosaur country—so much so that the state has a scenic byway system called the Dinosaur Diamond that connects ancient final resting places across the desert. But among the sites holding preserved tracks and dusty fossils, one boneyard stands out as a 148-million-year-old mystery: the Cleveland-Lloyd Dinosaur Quarry.

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