Science Fossil eggshells believed to be from some of the biggest dinosaurs that ever lived have been found in a surprisingly cool climate far from the equator. But those titanosaurs were too big to sit on their eggs. Microscopic evidence shows what they did instead to keep the eggs warm enough to hatch. Microscopic evidence reveals crocodile strategy kept their eggs warm Listen to this article Estimated 5 minutes The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Artist's reconstruction of a titanosaur nest. (Masato Hattori) Fossil eggshells believed to be from some of the biggest dinosaurs that ever lived have been found in a surprisingly cool climate far from the equator. But those massive titanosaurs couldn't keep their volleyball-sized eggs warm by sitting on them. "They're too big," said University of Calgary paleontologist Darla Zelenitsky, who has been studying the problem.…