OK, you seen to have some knowledge of such things, so perhaps you have
an answre to something I find interesting.  How does it happen that
otters, seals, porposes and other air breathing mammals can withstand
extremes of cold, dive to several hundred feet and stay submerged for
long periods of time and I can't.  For that matter, how does it happen
that they are so fast and maneuverable and I'm not.
Enquiring minds want to know.
Lee
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