Land-dwelling turtles from the Cretaceous period had extra-tough eggs

The first known example of an ancient fossilised turtle embryo preserved inside an egg shows that land-dwelling turtles from the Late Cretaceous period had exceptionally tough eggshells

Land-dwelling turtles from the Cretaceous period had extra-tough eggs
The first known example of an ancient fossilised turtle embryo preserved inside an egg shows that land-dwelling turtles from the Late Cretaceous period had exceptionally tough eggshells