Re: smallest ANCIENT non-bird dinosaur - was what I was asking

["T. Michael Keesey" <keesey@gmail.com>]

On Sat, May 10, 2008 at 3:06 AM, Mike Taylor <mike@indexdata.com> wrote:
>  >
>  > 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.
>
> Er.  Isn't that tautologously true?

No, a dead person can have living descendants without being ancestral
the the entire extant world population. (E.g., say, Charles Darwin.)

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