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National News

RESTRICTED -- This Worm Evolved Self-Fertilization and Lost a Quarter of Its DNA

An undated handout photo of two C. briggsae worms in the act of mating. The smaller worm is male, the larger worm is a hermaphrodite. A study has found that the worm lost a quarter of its DNA when it evolved to self-fertilize. (Da Yin/University of Maryland via The New York Times) -- NO SALES; FOR EDITORIAL USE ONLY WITH STORY SLUGGED WORMS COMPARISON BY YIN FOR JAN. 8, 2018. ALL OTHER USE PROHIBITED. --