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

[Mike Taylor <mike@indexdata.com>]

T. Michael Keesey writes:
 > >> 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.

Er.  Isn't that tautologously true?

 _/|_    ___________________________________________________________________
/o ) \/  Mike Taylor    <mike@indexdata.com>    http://www.miketaylor.org.uk
)_v__/\  "The government saved a dying planet where popular icons failed"
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