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  1. Health & Medicine

    Streamlined polio vaccine fights outbreaks

    Back to basics: A simplified polio vaccine works better than the standard approach and overcomes an unforeseen shortcoming in the widely used oral vaccine.

    By Nathan Seppa
  2. Humans

    Bypassing paralyzed nerves

    Implanted electrode helps paralyzed monkey clench its forearm muscles.

    By Patrick Barry
  3. Humans

    Infectious finds at ancient site

    A DNA analysis of skeletons found at a submerged Israeli site produces the earliest known evidence of human tuberculosis, now known to have existed at a 9,000-year-old farming settlement.

    By Bruce Bower
  4. Life

    Grunting humans, moles scare earthworms

    Science tackles the old mystery of why worm grunters who rub a stake in the ground can catch earthworms.