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Re: smallest ANCIENT non-bird dinosaur - was what I was asking
On Thu, May 8, 2008 at 8:15 PM, T. Michael Keesey <keesey@gmail.com> wrote:
> On Thu, May 8, 2008 at 11:07 AM, David Marjanovic
>
> <david.marjanovic@gmx.at> wrote:
> >
>
>
> > ----- Original Message -----
> > From: "Adam" <adam@crowlspace.com>
> > To: "Dinosaur Mailing List" <dinosaur@usc.edu>
> > Subject: Re: smallest ANCIENT non-bird dinosaur - was what I was asking
> >
> >> I've had interesting reactions when trying to
> >> explain how 10% of all the people alive 1,000 years ago became ancestors
> >> to everyone alive, and 90% didn't. That kind of shocks people.
> >
> > Is it even true? Or are you only talking about mitochondria or Y
> > chromosomes?
>
> I read in one book that if you go back 1600 (not 1000) years, everyone
> from that time who has living descendants is ancestral to everyone
> alive today. (I can't recall if there was no reference or if I was too
> busy to look it up....)
I don't recall if a time depth is given, but the basic point is in
Dawkin's _The Ancestor's Tale_.
--
Andreas Johansson
Why can't you be a non-conformist just like everybody else?