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Re: Omni article
> I was in a doctor's office yesterday and, for lack of anything better
> to read, picked up the June 1994 issue of Omni. It included an
> article by someone whose name I didn't recognize ...
> who asserted that, rather than birds being descended from
> dinosaurs, dinosaurs are descended from birds. ...
> The main points of the argument seemed to
> be that it is unusual for small animals to be descended from large
This is rather bogus. I know of at least one good counter-example,
unless he wants to claim that small mammal-like reptiles were
present all along. That is, the earliest, and indeed most living,
mammals were small organisms which evolved from the mammal-like
reptiles, which were largish organisms.
Also, the one very compelling argument says that the marmosets
are derived from full-sized monkeys, not directly from prosimians.
Size reduction can also be seen in many other groups - tardigrades
appear to be dwarfed onychophorans, for instance.
> and that the most birdlike dinosaurs date to much later than
So? The idea is that birds and "advanced" theropod dinosaurs
represent an adaptive radiation, not that there was a simple
linear relationship among them all.
The peace of God be with you.