Now, the discovery of the animal's fossilized bones suggests that the family of ginormous dinosaurs that this titanosaur belonged to started out small — each about the size of a Chihuahua — and were precocial, a new study finds. "Baby Rapetosaurus gives us our first in-depth look at a sauropod within just a few weeks of hatching," said study lead researcher Kristina Curry Rogers, an associate professor of biology and geology at Macalester College in Minnesota. "That's where I found them several years ago, when I was searching for bones of ancient crocodiles and turtles," Curry Rogers told Live Science in an email.
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