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>>By the way, it seems to me like all archosaurians had (and have) hard
shelled eggs. Wasn't that a special mark of all reptiles to sort them out from
I know that turtles and monontremes (and I'm pretty sure that crocodiles and
lizards) have soft-shelled eggs. If you were to squeeze one, it would bend, not
break. I'm not sure what good having a hard-shelled egg could possibly do for
parent, but I like the idea that the eggs were harder so they could support the
weight of a brooding mother.