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<p>In this Nov. 28, 2012 photo, the Rockefeller Center Christmas tree is lit during the 80th annual tree lighting ceremony at Rockefeller Center in New York. Scientists are working to decipher the DNA code of conifers, like this Norway spruce at Rockefeller Center in New York.</p>

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Cracking Christmas trees' DNA code
December 14, 2012 8 p.m.

Cracking Christmas trees' DNA code

NEW YORK - To millions of people, the Christmas tree is a cheerful sight. To scientists who decipher the DNA codes of plants and animals, it's a monster.