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| View Larger Image | History -- Mega Disasters: Mega Gamma Ray Burst | DVD-RAlso With: Creative Differences (Producer)
| List Price: | $24.95 | | | Available: | Usually ships in 24 hours |
| | Binding: | DVD-R | | Run Time: | 50 minutes | | Studio: | A&E Television Networks | | Number of Discs: | | | Release Date: | September 18, 2009 | | Sales Rank: | 184,402th |
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EDITORIAL REVIEWS |
Description
Gamma ray bursts occur randomly and often. At times, they light up the reaches of deep space like fireworks. Just ten seconds' exposure to one would spell doom for Earth. And scientists at the University of Kansas believe such a thing may have happened 450 million years ago. The resulting destruction of the ozone layer and chemical smog might explain the mass extinction that ended the Ordovician Period. If it occurred once, what's to stop it from happening again? And what would be the result if such a devastating event happened today?This product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply. |
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