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  1. Health & Medicine

    Migraines during pregnancy may be linked to stroke

    Pregnant women who have migraines also face a heightened risk of stroke and other vascular diseases, a new study finds.

    By Nathan Seppa
  2. Health & Medicine

    Blood type could matter in pancreatic cancer

    People with type O blood are less likely to develop pancreatic cancer than are people with type B blood, a study finds.

    By Nathan Seppa
  3. Life

    Aphids support symbionts with borrowed DNA

    Aphids borrowed at least two genes from bacterial buddies, and those genes now support another bacterium that lives in the insects.

    By Tina Hesman Saey
  4. Physics

    Single top quark detected

    Scientists observe elusive single top quark, usually found in pairs.