Uncategorized

  1. Environment

    The way poison frogs keep from poisoning themselves is complicated

    Gaining resistance to one of their own toxins forced some poison dart frogs to make other genetic tweaks, too.

    By Laurel Hamers
  2. Neuroscience

    Gene variant linked to Alzheimer’s disease is a triple threat

    A genetic risk factor for Alzheimer’s disease works on multiple aspects of the disease, researchers report.

    By Tina Hesman Saey
  3. Psychology

    Confusion lingers over health-related pros and cons of marijuana

    50 years ago, the effects of chronic marijuana smoking on mental health were hazy. They still are.

    By Bruce Bower
  4. Earth

    Plate tectonics started at least 3.5 billion years ago

    Analyses of titanium in rock suggest plate tectonics began 500 million years earlier than thought.