NOVA - Magnetic Storm - Region 1 DVD
Description:
What is weakening Earth's invisible shield? Magnets have the power to attract and repelsometimes on a massive scale. The Earth's molten corea violent mix of searing heat, crushing pressure, and a billion trillion tons of liquid ironcreates an invisible shield that surrounds the globe, guarding against a constant barrage of deadly radiation from space. But over the last few decades, the Earth's magnetic field has weakened dramatically, intriguing scientists across the globe. The power generated 2000 miles beneath our feet protects us every day, but the loss of Earth's magnetic field is a brewing storm that affe
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Manufacturer: WGBH Boston
Release date: 17 February 2004
Number of discs: 1
EAN: 9781593751074 UPC: 783421370098
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Release date: 17 February 2004
Number of discs: 1
EAN: 9781593751074 UPC: 783421370098