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  1. Physics

    When the ink hits the page

    Scientists investigate the physics of the most printable ink and find the most viscous inks don’t make the grade.

    By Solmaz Barazesh
  2. Archaeology

    Horse domestication traced to ancient central Asian culture

    New lines of evidence indicate that horses were domesticated for riding and milking more than 5,000 years ago by members of a hunter-gatherer culture in northern Kazakhstan.

    By Bruce Bower
  3. Health & Medicine

    Chemotherapy drug may in fact strengthen some cancer cells

    Research shows a standard drug for treating brain cancer can actually make some cells more aggressive.

    By Laura Sanders
  4. Tech

    Watching Earth for 25 years

    The Landsat 5 satellite launched in 1984 with a mission to orbit and image Earth's surface for three years.