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  1. Neuroscience

    A brain chemical tied to narcolepsy may play a role in opioid addiction

    Long-term use of opioids such as heroin is linked to having more brain cells that release a chemical that regulates wakefulness and arousal.

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  2. Planetary Science

    Mars got its crust quickly

    The Martian crust had solidified within 20 million years of the solar system’s formation.

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  3. Health & Medicine

    How to make CAR-T cell therapies for cancer safer and more effective

    CAR-T cell therapy was approved by the FDA in late 2017. Now, scientists are working to tame the cancer treatment’s side effects.

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  4. Genetics

    Readers ponder geothermal power and more

    Readers respond to stories from the May 26, 2018 issue of Science News.