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Investigates to weakened state of the Earth's magnetic field and what its loss would mean to the world as we know it.
WGBH/Boston, PO Box 2284, South Burlington, VT 05407-2284, Phone: (617)492-2777, Toll-free: 800-989-8670, Fax: (802)864-9846, Email: sarah_slater@wgbh.org, URL: http://www.wgbh.org
Available on VHS, DVD
Running time 60 minutes.
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