News

  1. Archaeology

    Complex supply chains may have appeared more than 3,000 years ago

    Finds from one of the world’s oldest shipwrecks hint that miners in Central Asia and Turkey provided a crucial metal to Mediterranean rulers.

    By Bruce Bower
  2. Physics

    Here’s how to make a fiber-optic cable out of air using a laser

    A hollowed-out laser beam heats a tube of air that surrounds cooler air, providing a way to guide light much the way fiber optics do.

    By James R. Riordon
  3. Archaeology

    Lasers reveal sites used as the Americas’ oldest known star calendars

    By around 3,100 years ago, Mesoamerican ritual complexes tracked celestial cycles using a 260-day count, a huge lidar mapping project shows.