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To: techdiver@opal.com
Subject: Underwater breathing: another way
From: "A.Appleyard" <A.APPLEYARD@fs*.mt*.um*.ac*.uk*>
Date: Tue, 28 Mar 1995 16:05:40 GMT

  I don't know how relevant to diving people will think this is: at least to
`diving' by animals: on UK Channel4 TV last night a natural history program
about sea-snakes (reptiles, not eels or amphibians) said that at least one
species of them absorbs a third of its oxygen requirements from the sea
through its skin.
  I wonder how possible it would be for a species of land vertebrate to evolve
what may be called an "aqua lung" in a different sense, i.e. an ability to
breathe seawater with its lungs. I wonder if that is the way of respiration of
whatever lies behind "giant sea serpent" and similar sightings.

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