Uncategorized

  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. Math

    Coins in a Row

    A simple game involving coins in a row has unexpected complexities.

    By Ivars Peterson
  4. Humans

    From the May 4, 1935, issue

    New National Academy of Sciences president, discovery of element 93 confirmed, and brains studies involving a monkey swinging on a trapeze.