News

  1. Planetary Science

    This is the biggest known comet in our solar system

    The nucleus of comet Bernardinelli-Bernstein is about 120 kilometers across — about twice the width of Rhode Island — and is darker than coal.

    By Sid Perkins
  2. Anthropology

    How ancient, recurring climate changes may have shaped human evolution

    Climate changes drove where Homo species lived over the last 2 million years, with a disputed ancestor giving rise to H. sapiens, a new study claims.

    By Bruce Bower
  3. Agriculture

    More than 57 billion tons of soil have eroded in the U.S. Midwest

    Researchers discovered startling soil erosion rates in the Midwest. Farming has worsened erosion, but no-till practices and cover crops can help.