Fossil discoveries suggest the earliest dinosaurs laid soft-shelled eggs
Finds force scientists to rethink the evolution of dinosaur eggs
![soft-shelled dinosaur egg fossil](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/06/062220_jl_dino-eggs_feat.jpg?fit=1028%2C579&ssl=1)
The eggs of Mussaurus, a dinosaur that lived more than 200 million years ago, had soft shells. Traces of a soft shell are visible here as the black egg-shaped halo surrounding the dinosaur embryo.
© Diego Pol