Feature

  1. Learning to Listen

    Disparate groups of creatures, including bats, toothed whales, and birds, have evolved biological sonar that they use to track prey, but other creatures have evolved ways to detect this sonar and thereby increase their odds of survival.

    By Sid Perkins
  2. Materials Science

    Something to Chew On

    Researchers are closer than ever to making synthetic enamel to improve dental implants and perhaps to grow a whole tooth from scratch.

    By Alexandra Goho
  3. Ecosystems

    Decades of Dinner

    Sunken whale carcasses support unique marine ecosystems that display stages of succession and change, just as land ecosystems do.

    By Susan Milius
  4. Tech

    Radio-a-Wreck

    Radio transmitters broadcasting from imploding buildings are informing engineers about how such collapses disrupt radio communications and how rescuers might overcome those disruptions.