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Mammals like us tend to go through a period of extreme growth when we're young and then stay the same size once we reach adulthood. The question of how an animal gets big is a surprisingly tricky one. All these questions about how theropods grew could impact our understanding of the evolution of the group.' Makovicky developed the idea for the project and also discovered several of the dinosaurs whose fossils were analyzed in the study. Makovicky, a scientific affiliate of the Field and professor of geology at the University of Minnesota and the paper's senior author, says, 'We also wanted to see if we got the same growth record when we sampled a variety of different bones from the same skeleton. 'We wanted to look at a wide swath of different theropods, two-legged, carnivorous dinosaurs, in order to understand broader patterns of growth and evolution in the group,' says Tom Cullen, the lead author of a new study in Proceedings of the Royal Society B.Ĭullen, a scientific affiliate of Chicago's Field Museum who worked on the study as a postdoctoral researcher at the Field with the museum's then-curator of dinosaurs, Pete Makovicky, explains, 'We particularly wanted to understand how some of them got so big-is the way T.

Biggest dinosaur Steve biggest Tyrannosaurus