Lap Dinos? Gigantic Sauropods Started Out Chihuahua-Size

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 t