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    Re: Sperm whale buoyancy.
    From: Peter Fogg
    Date: 2007 Mar 21, 02:56 +1100

    Evolution is truly amazing. From creatures adapted to live in the seas
    came animals comparable with dogs and cows that returned to the ocean
    and re-adapted themselves for such a specialised existence as the
    sperm whale.
    Evolution seems quite capable of these abrupt about faces; granting
    what is useful, withdrawing what is surplus to requirements.
    We tend to think highly of our own specialities and in particular of
    our intelligence, which seems to be quite unique (although when you
    look at some of the results you have to wonder ..).
    But from evolution's point of view intelligence is nothing special,
    just a useful adaptation. It is typical of hunting animals and
    typically is not remarkable in those creatures for whom it serves
    little useful purpose. Indeed these animals enjoy advantages of, for
    example, having a high boredom threshold - they seem quite contented
    to do little enough, which can be a blessing both for themselves and
    their environment.
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