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National

  • Wolfgang Kaehler/LightRocket
    /
    Getty Images
    Get ready for a biology lesson. Certain plants have extra sets of chromosomes. And it turns out, it's a useful trait for a species facing a dramatic event like climate change.
  • Rubberball/Mike Kemp/Getty Images
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    Brand X
    A new study suggests the growing educational and economic divide between men and women is reshaping marriage and family life in America — leaving many women with a shrinking pool of economically stable partners.
Adam Pretty
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Getty Images Europe
In tennis, clay has a reputation for being one of the harder surfaces to play on. But a few pros shared some of their tips for staying sharp.