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Re: Egg-sistential question
On Tue, 24 Sep 1996, Rob Meyerson wrote:
> A question on dino-eggshells has been put to me recently, and I
> thought I'd put it to the group.
> When one looks at modern reptiles, practically all of them lay eggs
> with a leathery outer shell. This type of egg is also laid by the
> dinosaurian cousin, the crocodile. However, this does not apply to
> birds, who lay eggs with very hard shells.
> Are there any thoughts as to when the bird-like egg first evolved? Is
> it purely an Avian trait, or can it be extended to most/all dinosaurs?
And further out of curiousity, can one tell whether fossilized eggs were
leathery or hard?
+----------+ Rich Travsky RTRAVSKY @ UWYO . EDU
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