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  1. Physics

    Imitation dark matter axions have arrived. They could reveal the real thing

    A long-elusive, hypothetical subatomic particle called the axion can be simulated and potentially detected in a type of thin material.

    By Emily Conover
  2. Neuroscience

    Early Parkinson’s trials revive stem cells as a possible treatment

    The phase I clinical trials showed stem cell transplants for Parkinson’s disease appear to be safe and might restore dopamine-producing brain cells.

    By Laura Sanders
  3. Health & Medicine

    A messed-up body clock could be a bigger problem than lack of sleep

    For a good night of sleep, consider getting your circadian rhythm back in sync with the sun. Here’s how to do it.