Elaine Hoffman wrote:

> 
> Found several references to studies where the participants where kept
> underground and/or controlled environments.  I distinctly remember
> reading about a woman who spent several months underground in one
> such study who suddenly went from a "normal" 24 hour CR pattern to
> one that she doubled her sleep/waking times automatically.  I vaguely
> remember that this study they didn't artifically turn on the lights
> and such but only when she woke up.  And she had no idea that she'd
> switched to this elongated pattern -- to her she was sleeping the
> same amount of time as before.
> 
  Interesting stuff, but the usual objection applies - none of the 
studies used fativores as test subjects.

  Something else - using the paleolithic model, which is aware of the 
habits of hyenas, it makes sense that some would watch over the 
sleepers, lest they be eaten in their sleep.

William