Photo: Shellfish May Invade North Atlantic As Ice Melts

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Melting icebergs and bits float at low tide in Nunavut, Canada, in this undated photograph.

If Arctic sea ice melts, as expected, a mollusk migration from the North Pacific to the North Atlantic will resume for the first time in 3.5 million years, scientists said in August 2008.

Photograph by Nick Norman/NGS

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