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  1. Physics

    Vanadium dioxide’s weird phase transition just got weirder

    When shifting from one crystalline structure to another, the atoms inside vanadium dioxide bumble around a lot more than expected.

    By Maria Temming
  2. Astronomy

    The Milky Way feasted on a smaller galaxy 10 billion years ago

    The Milky Way swallowed another galaxy billions of years ago, and the leftover stars are still roaming the sky.

    By Lisa Grossman
  3. Archaeology

    Fossils hint hominids migrated through a ‘green’ Arabia 300,000 years ago

    A once-green Arabia may have enabled Stone Age entries by Homo groups.

    By Bruce Bower
  4. Tech

    Virtual reality therapy has real-life benefits for some mental disorders

    Cheap, user-friendly virtual reality hardware could help VR therapy go mainstream.