News

  1. Ecosystems

    Fish Stew: Species interplay makes fisheries management tricky in the long run

    Annual fluctuations in certain fish populations can be best understood and controlled by accounting for ecological factors, such as predation by other fish, in addition to fisheries harvests.

    By Ben Harder
  2. Health & Medicine

    Prion Proof? Evidence grows for mad cow protein

    Misfolded proteins known as prions can cause disease when injected into the brains of genetically engineered mice.

    By Nathan Seppa
  3. Humans

    EPA to fine DuPont over ingredient in Teflon

    The Environmental Protection Agency says it may levy a fine surpassing $300 million against DuPont for concealing evidence that it was contaminating the environment with perfluorooctanoic acid.