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  1. Planetary Science

    Planetary Peekaboo

    Astronomers aren’t playing games when it comes to spotting an exoEarth.

    By Nadia Drake
  2. Tech

    When Networks Network

    Once studied solo, systems display surprising behavior when they interact.

    By Elizabeth Quill
  3. Chemistry

    Too-young caterpillars like scent of sex

    Larvae respond to mate-attracting pheromones, raising evolutionary questions about what a very grown-up chemical signal could mean to them.

    By Susan Milius
  4. Humans

    Herders, not farmers, built Stonehenge

    Farming’s temporary demise in ancient Britain may have spurred the creation of the iconic stone circle.

    By Bruce Bower
  5. Planetary Science

    Voyager chasing solar system’s edge

    On the 35th anniversary of the spacecraft’s launch, scientists ponder when it will move beyond the sun’s reach.