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Re: A long post about DUMB METATHERIANS vs EVIL, SMART PLACENTALS



----- Original Message -----
From: "John Bois" <jbois@umd5.umd.edu>
To: "Ronald Orenstein" <ornstn@home.com>
Cc: "Ken Kinman" <kinman@hotmail.com>; <dinosaur@usc.edu>
Sent: Tuesday, May 22, 2001 12:22 AM
Subject: Re: A long post about DUMB METATHERIANS vs EVIL, SMART PLACENTALS


> On Mon, 21 May 2001, Ronald Orenstein wrote:
>
> > John seems to be reasoning teleologically: he has decided that all
> > marsupials are "inferior" to all placentals, therefore opossums must be
> > unable to compete with placentals no matter what the facts say.
>
> No.  He has observed the fact that marsupials were replaced by placentals
> in one part of the world 65 mya.

Well, replacement... there were both meta- and eutherians before and after
the K-T. And the metatherians weren't so rare.

In the next post, HP John Bois wrote:

> On Mon, 21 May 2001 Dinogeorge@aol.com wrote:
>
> > The pattern of animal survival is essentially this: above a certain
size, all
> > land and sea animals were wiped out.
>
> What size is this that includes the killing of smaller dinosaurs and the
> escape of crocs?

Crocs were lying flat in the freshwater. This may have had an effect.
*Brachychampsa*, an alligator apparently specialized for crushing turtles,
did die out.