🚀 go-pugleaf

In article <DALTON.94Mar11132744@calico.geop.ubc.ca>,
David Dalton <dalton@calico.Geop.UBC.CA> wrote:
>
>An acquaintance believes that there is a link
>between the following three things:
>
>1. problems with the Mars expeditions & Mars "figures"
>2. ancient texts in Sumerian libraries
>3. "missing link" DNA splicing by aliens.
>
>He said that he has seen video "evidence".
>
>While I do not believe him, I told him I would
>search for evidence.    So if any of you know
>of relevant paper or electronic documents, let
>me know.

	It is perhaps worth noting - as I do whenever I give a talk on
this subject - that the hypothesis that life on earth was seeded by
aliens is in fact testable - after we meet the aliens.  There are
several families of proteins - e.g. glyceraldehyde 3-phosphate
dehydrogenase and triose-phosphate isomerase - that are so well
conserved between prokaryotes and eukaryotes (last common ancestor > 2
billion years ago) that they would be expected to show statistically
significant similarity scores and alignments with sequences that had
diverged as much as 15 billion years ago - the age of the universe.
Thus, when we encounter alien creatures, a little sequencing should
tell us when they dropped off our self-replicating ancestors.

	For more information on higly conserved proteins and
theoretical look back times (but not on sequence comparison with
aliens), see: Doolittle et all (1986) Cold Spring Harbor Symp. Quant.
Biol.  51:447-455 "Relationships of human protein sequences to those
of other organisms".

Bill Pearson