Uncategorized

  1. Health & Medicine

    A Toxic Side of Weight Loss: Pollutants may slow body’s metabolism

    Weight loss releases toxic chemicals into the bloodstream, which may slow the body's metabolism.

    By Carrie Lock
  2. Earth

    Sea Change: Carbon dioxide imperils marine ecosystems

    Almost half the carbon dioxide produced by human activity in the past 2 centuries is now dissolved in the oceans, resulting in chemical changes that, if unchecked, could threaten some marine ecosystems.

    By Sid Perkins
  3. Humans

    Caring for a Historic House

    The National Park Service offers advice on taking care of the exterior—or skin—of an old home. From repairing shingles and fixing chimneys to painting trim and improving site drainage, this online course provides handy pointers about what to do and what not to do to keep an historic house in good shape.