-> -> This pattern has been checked and the Earth's field seems to reverse
-> -> every 120,000 - 370,000 or so years.
-> -> A spot in the South Pacific has already reversed field.

-> I thought it was the 22000 year cycle of the Earth's axial wobble
-> causing the axial tilt to swing between 16 and -16 degrees. Or maybe
-> that was to explain changing weather patterns. I don't recall magnetic
-> fields associated with that cycle.

Go to www.google.com and do a search on
"Earth's magnetic field" +reversal
                     
Put the text string in quotes as above and the + is optional.
You'll find numerous references including the NOVA program
I cited as authority. 

-> -> I believe, but may be mistaken, Mars has .6 Earth gravity.

-> That is the moon.

Nope, moon is 1/6th G.

-> -> You can the VHS tape from PBS - NOVA.

-> VHS? India has forgotten that technology and moved on to DVD :]

Well I don't have DVD here, of course NOVA offers that format.
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