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(More customer reviews)This DVD leads us through time to examine the strength of the Earth¡¦s magnetic field through various perspectives, from potteries to volcano rocks. It also briefly describes the consequences of Earth without the protection of the magnetic field, how Earth generates the magnetic field, and when the next reversal of magnetic field occurs.
I find that the information on the DVD is not detailed enough. However, the PBS website (http://www.pbs.org/wgbh/nova/magnetic/) gives me a better understanding of the Earth¡¦s magnetic field.
Click Here to see more reviews about: NOVA - Magnetic Storm (2003)
What is weakening Earth’s invisible shield? Magnets have the power to attract and repel-sometimes on a massive scale. The Earth’s molten core-a violent mix of searing heat, crushing pressure, and a billion trillion tons of liquid iron-creates 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 affects us all. While experts research and debate, persistent questions remain. Is a rare geomagnetic reversal the cause of earth’s inner turmoil? And if the magnetic field were to vanish altogether, would Earth become as lifeless as Mars? Travel from Hawaii’s molten lava flows to the mountains of Oregon and into the far reaches of outer space for a charged look at Earth’s magnetic history and potentially deadly future. Special DVD features include: materials and activities for educators; a link to the NOVA Web site; scene selections; closed captions;and described video for the visually impaired. On one DVD5 disc.Region coding: All regions.Audio: Dolby stereo.Screen format: Letterboxed.
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