Norway has a cluster of islands in the Arctic Ocean that boast perpetually frozen temperatures. Specifically, a mountain called Spitsbergen has the coldest, most frigid temperatures. If the mechanical refrigeration system failed, these frigid temperatures could preserve the seeds contained in the vault. Although the mountain is frozen all year around, the seeds would be protected in the vault and still have an inner temperature of 23 F (-5 C).
Source:Â http://curiosity.discovery.com
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