>I'm not sure I get your context, but off the top of my head, "mu" is a
>Greek letter, a shorthand for "um... both, either, your question is
>unanswerable", and a mythical Lost Continent like Atlantis and
>Lemuria.

Mu was in the Pacific or Indian Oceans, trying to explain some strange thing or another that people felt like trying to explain woth catastrophie instead of a more rational idea like continental drift. Atlantis for the Egyptians and Maya, Lemuria to explain how monkeys got from Africa to South America.

My New Age mythology's a little rusty these days after about fifty someodd credits of standard, college level anthropology.

Berk Watkins
Student of Quantum Bogodynamics...