Uncategorized

  1. Earth

    Soil eroded by glaciers may have kick-started plate tectonics

    How plate tectonics got going is a mystery. Now scientists say they’ve found a key part of the story: massive piles of sediment dumped in the ocean.

    By Carolyn Gramling
  2. Astronomy

    The accretion disk around our galaxy’s black hole has been spotted at last

    The Milky Way's central black hole has a disk of gas and dust orbiting it, astronomers can finally say with confidence.

    By Lisa Grossman
  3. Animals

    Tiny structures in dragonfish teeth turn them into invisible daggers

    The teeth of deep-sea dragonfish are transparent because of nanoscale crystals and rods that let light pass through without being scattered.