50 Years Ago

  1. Animals

    50 years ago, scientists warned of a sparrow’s extinction

    Only 17 dusky seaside sparrows remained in 1968. Today, there are none.

    By Bethany Brookshire
  2. Health & Medicine

    50 years ago, starving tumors of oxygen proposed as weapon in cancer fight

    Starving cancerous tumors of oxygen was proposed to help kill them. But the approach can make some cancer cells more aggressive.

    By Cassie Martin
  3. Health & Medicine

    50 years on, vaccines have eliminated measles from the Americas

    Thanks to high vaccination rates, measles has mostly disappeared from the Americas.

    By Laurel Hamers
  4. Ecosystems

    50 years ago, invasive species traveled the Suez Canal

    Hundreds of Red Sea species used the Suez Canal to migrate to the Mediterranean Sea, leading to the decline of some native species.