NOVA’s Our Fragile Environment DVD Series - Mystery of the Megaflood
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Product Number: SB44534M Price: $19.95In Stock. Usually ships in 24-48 hours. |
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It was the greatest flood of the past two million years, and it posed a scientific riddle. One geologist became convinced that thousand-foot-deep floodwaters had scoured out vast areas of the American northwest near the end of the last ice age. 56 minutes.
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