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Feb. 25, 2021 , 2:00 PM Any parent of growing teenagers knows their appetites can reach gargantuan proportions. Now, imagine you had a young T. rex checking the fridge. The outsize appetites of growing dinosaurs reshaped food chains in their environment and squeezed out other carnivores, according to a new study, published today in  Science, of hundreds of dinosaurs of all sizes. The “elegant study puts real numbers on something we’ve suspected for a while,” says Steve Brusatte, a paleontologist at the University of Edinburgh who was not involved with the study. There weren’t many midsize meat eaters “because the juveniles and teenagers and subadults of the big beastly dinosaurs were hoarding those niches.”

United statesFelisa smithMike bentonGregory ericksonKathleen lyonsSteve brusatteGretchen vogelFlorida state universityUniversity of new mexicoUniversity of nebraskaUniversity of bristolUniversity of edinburghKatlin schroederNew mexicoPaleobiology databaseFlorida state