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  1. Health & Medicine

    Montezuma’s Welcome Revenge? Bacterial toxin may fend off colon cancer

    A diarrhea-inducing toxin from some strains of the common gut bacterium E. coli stifles colon cancer cell growth and may lead to new treatments.

    By Kendall Morgan
  2. Earth

    Dirty Story: Farming has increased flow of soil onto reef

    Agricultural practices that early European settlers brought to eastern Australia sped the pace at which soil washes out to sea and settles over the Great Barrier Reef.

    By Ben Harder
  3. Astronomy

    Cosmic Revelations: Satellite homes in on the infant universe

    A new portrait of the infant universe pins down the age of the universe—13.7 billion years—to an unprecedented accuracy of 1 percent, provides new evidence that the universe began with a brief but humongous growth spurt, and reveals that it already contained a plethora of stars when it was just 200 million years old.