News

  1. 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
  2. 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.

    By Bruce Bower
  3. Microbes

    Meet some of the microbes that give cheeses flavor

    Knowing which genus of bacteria is responsible for which flavor could open the door to new types of cheese.