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From: Slocum.CSCDA@HI-MULTICS.ARPA (Brett Slocum)
Newsgroups: net.space
Subject: Re: Uranian poles, etc.
Message-ID: <860225171351.088892@HI-MULTICS.ARPA>
Date: Tue, 25-Feb-86 12:13:00 EST
Article-I.D.: HI-MULTI.860225171351.088892
Posted: Tue Feb 25 12:13:00 1986
Date-Received: Fri, 28-Feb-86 06:37:06 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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If you take Earth as an example, the rotational North pole and
the pole above the plane of the planet's orbit are both the same:
the North Pole.  It is interesting to note that the North magnetic pole
is at the South rotational pole.  As one submitter reported,
this orientation switches from time to time.  In fact, if you look at
ocean floor material near the mid-Atlantic ridge, you find alternating
bands of magnetic polarization.  There is one theory of periodic species
extinction that says polarity switches bring on the next round of extinctions.
This is a theory for mass extinctions in addition to extra-terrestrial bombardment.

Brett Slocum 
<Slocum.CSCDA\@HI-MULTICS.ARPA>