NOVA - Magnetic Storm Movie Streaming
Dimanche, août 15th, 2010 |
NOVA - Magnetic Storm Movie Streaming.
Movie Title: NOVA - Magnetic Storm NOVA - Magnetic Storm is available for streaming or downloading. |
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.
This is an entertaining, informative, and even-handed look at the Earth’s magnetic field, how it has changed over time, what it is doing now, and what it all might mean.
The computer graphics used are interesting and effective, but the most interesting part was the (previously unknown to me) magnetic history stored in volcanic rock. Some of the conclusions they draw from this work can really make you think.
Although documentary DVDs are usually not very cost effective, giving you a (if you’re lucky) 1-hour program for the price of a 2-hour blockbuster movie, this one is worth a try. And as the Earth’s magnetic field continues to change (it’s clearly in the midst of a fast-moving decline right now), this could be a good source of entertaining info to review later.
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