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Millions of years before Tyrannosaurus rex roamed western North America, generations of its multi-great-great-grandparents likely dwelt and evolved in what was then a much warmer, balmy environment, according to a recent scientific paper by a Montana State University student. Elias Warshaw, a senior studying paleontology in MSU’s Department of Earth Sciences in the College of Letters and Science, is the lead author of an article published in the journal PeerJ that analyzes a fossil discovered in Montana’s Valley County in 2017 and suggests it...