• A Greener Planetary Greenhouse
    In recent years Earth-orbiting satellites have seen plants growing more vigorously than usual over northern parts of our planet.
  • Guerrero Negro
    Guerrero Negro is a popular destination for ecotourists to gaze at the gray whales, but scientists go to investigate an ecosystem that hold important clues to what life was like on early Earth.
  • Starved for Nitrogen
    A team of researchers, including a NASA scientist, reports that an early-life nitrogen crisis may have triggered a critical evolutionary leap about 2 billion years ago.