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  1. Life

    Gene variants linked to Crohn disease have little effect, study finds

    A genetic variant linked to Crohn disease does not raise the average person’s risk of developing the condition, a new study finds.

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  2. Chemistry

    Superheavy element 117 makes debut

    An international team of researchers fill a gap in the periodic table, and lay another stepping stone along the path to the “island of stability.”

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  3. Health & Medicine

    Languages use different parts of brain

    Different areas are active depending how the grammar of a sentence conveys meaning.

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  4. Climate

    Alaskan peatlands expanded rapidly as ice age waned

    The rapid growth of Alaskan wetlands before 8,600 years ago was due to hotter summers and colder winters, which could spell trouble in a warmer world, a new study suggests.