Fossilized eggs reveal new secrets about world’s biggest dinosaurs

The largest dinosaurs that ever lived were able to reproduce at high latitudes — or regions far from the equator — and came up with a clever strategy to keep their eggs warm, a study of a trove of titanosaur eggs unearthed in Argentina has revealed. Most titanosaur eggs and eggshells, like those of other dinosaurs, have been found in lower-latitude regions closer to the equator, where warmer temperatures would have made incubating the eggs easier. Scientists think these long-necked, small-brained, plant-eating giants — part of a group known as sauropods — lived in herds and may have migrated over long distances, nesting in the same place for millennia. “We know their bones have turned up in places as far south as Antarctica and southern Argentina, and as far north as Mongolia and Texas,” said Darla Zelenitsky, a paleontologist and associate professor at the University of Calgary in Alberta.