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  1. Health & Medicine

    In mice, a high-fat diet cuts a ‘brake’ used to control appetite

    A fatty diet changes the behavior of key appetite-regulating cells in a mouse brain.

    By Laura Sanders
  2. Astronomy

    In a first, telescopes tracked a lone fast radio burst to a faraway galaxy

    First-time observations suggest that the cause of one-time fast radio bursts is different from what triggers repeatedly flashing radio bursts.

    By Maria Temming
  3. Health & Medicine

    Antioxidants may encourage the spread of lung cancer rather than prevent it

    Antioxidants protect lung cancer cells from free radicals, but also spur metastasis, two new studies suggest.

    By Nicoletta Lanese
  4. Animals

    Some ancient crocodiles may have chomped on plants instead of meat

    Fossil teeth of extinct crocodyliforms suggest that some ate plants and that herbivory evolved at least three times in crocs of the Mesozoic Era.