First dinosaur eggs were soft like a turtle’s: New study suggests that hard eggshells evolved at least three times in dinosaur family tree 

New research suggests that the first dinosaurs laid soft-shelled eggs — a finding that contradicts established thought. The study analyzed the eggs of two vastly different non-avian dinosaurs and found that they resembled those of turtles in their microstructure, composition, and mechanical properties. The research also suggests that hard-shelled eggs evolved at least three times independently in the dinosaur family tree.

Source: First dinosaur eggs were soft like a turtle’s: New study suggests that hard eggshells evolved at least three times in dinosaur family tree — ScienceDaily

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