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  1. Earth

    Satellites unravel a spot of mystery

    Five satellites that happened to be in the right places at the right time may have confirmed the cause of proton auroral spots, aurora-like phenomena that appear high in Earth's atmosphere.

    By Sid Perkins

  2. Toddlers ride rail to tool use

    Toddlers' ability to modify their use of a handrail as they walk across a narrow bridge represents an early example of tool use, according to two psychologists.

    By Bruce Bower
  3. Astronomy

    Galactic RAVE

    A new study of thousands of Milky Way stars and their motion toward and away from Earth should provide new clues about how our galaxy formed.

    By Ron Cowen

  4. 19252

    Your article says that Robert R.