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  1. Health & Medicine

    Manipulating nerve cells makes mice ‘see’ something that’s not there

    Using optogenetics to stimulate about 20 nerve cells causes mice to perceive nonexistent vertical or horizontal lines.

    By Laura Sanders
  2. Materials Science

    Permanent liquid magnets have now been created in the lab

    Magnets that generate persistent magnetic fields are usually solid. But new little bar magnets have the mechanical properties of liquids.

    By Maria Temming
  3. Paleontology

    A flexible bone that helps mammals chew dates back to the Jurassic Period

    A flexible bone that helps with chewing may have helped give rise to the Age of Mammals, a new fossil shows.

    By Carolyn Gramling
  4. Tech

    50 years ago, lambs survived but didn’t thrive inside artificial wombs

    Artificial wombs to support preemie babies are closer to reality.