Fossilized eggshells discovered in southern Argentina suggest some of the largest dinosaurs could reproduce at high latitudes, according to CNN. Researchers found 255 fragments in the Chorrillo Formation, dating back about 68 million years.
The discovery provides the southernmost definitive evidence of dinosaur eggs and indicates titanosaurs nested at roughly 55 to 60 degrees south.
The finding challenges the idea that titanosaurs only traveled to high-latitude regions during warmer periods. Paleontologists said the evidence suggests they could complete their reproductive cycle there.
Titanosaurs included some of the largest animals ever known, with individuals estimated to weigh up to 75,000 kilograms. Despite their enormous adult size, their eggs were relatively small and may have held about four liters of liquid.
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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. https://t.co/miBaKbeFgZ pic.twitter.com/aODGYewi6t
— CNN (@CNN) September 9, 2026
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