Uncategorized

  1. Earth

    Pushing back an oxygen-rich atmosphere

    Hematite crystals in Australian rocks hint that Earth’s atmosphere was oxygenated earlier than previously thought.

    By Sid Perkins
  2. Humans

    Radio relief for Rwandans’ social conflicts

    Rwandans who listened to a yearlong radio soap opera developed increased tolerance for dissent, a greater sense of cooperation and more acceptance of marriage across ethnic lines.

    By Bruce Bower
  3. Earth

    Goo gives eels just the right buoyancy

    Scientists survey the specific gravity of 25 marine critters.

    By Rachel Ehrenberg

  4. Letters

    Impossible view In “Milky Way puts on weight” (SN: 1/31/09, p. 8), you claim to show an image of the Milky Way.