Though they’ve often been overshadowed by skeletons and bones, fossilized eggshells are a fascinating source of information.
Eggs have been laid on land by birds, reptiles, dinosaurs and a few oddball mammals for more than 200 million years. And humans have been using some of these eggs as a nutritious source of food, and their shells as bowls, bottles and jewelry for most of our history on the planet.
The neat layout of oviraptor nests also suggested that they were brooders that sat upon eggs to hatch them—even giant oviraptors that weighed 1,500 kilograms and laid half-meter long eggs, said Darla Zelenitsky, a dinosaur egg expert and associate professor in the department of geoscience at the University of Calgary in Canada. “These fossils also show very precisely arranged eggs, stacked in rings, probably optimized for sitting on the eggs,” she explained.
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