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Re: Comments on _Longisquama_ in _Science_.
In a message dated 6/27/00 8:49:39 PM, firstname.lastname@example.org writes:
<< Great White is endothermic? I understood tuna are,
but never heard that applied to swordfish (despite
their being fairly closely related). >>
Several species of mackerel shark are and so are the billfish. That's when I
began to doubt a lot of characterizations like "sharks are primitive and
haven't changed in hundreds of millions of years." The Great White is the
most advanced thing with gills.