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Re: Tyrannosaur eggs and evolution
> The null hypothesis, on phylogenetic basis, is that all dinosaurs used some
> degree of parental care, as both the in-group (birds) and the closest
> surviving outgroup (crocodillians) protect the nest and the young for some
This is also why I have concluded that all dinosaurs probably had
a functionally four-chambered heart.
The peace of God be with you.