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Brenda Hall, researcher at the University of Maine, holds onto an elephant seal tibia (leg bone) that was so well preserved that it still has flesh attached. The bone was found in a frozen beach in Antarctica. (Bangor Daily News/Michael York)
The presence of the seals in the Ross Sea, a section of the continent that today is too cold to support them, is an indication that climate in that area has changed in the past 7,000 years and that the area was once warmer than it is today.