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  1. Planetary Science

    Doggone! Pluto gets a planetary demotion

    The solar system has only eight planets, and Pluto isn't one of them, according to the first-ever definition of a planet, approved last week by the General Assembly of the International Astronomical Union.

    By Ron Cowen

  2. 19726

    I was sorry to learn Pluto did not qualify as a planet (“New Solar System? Twelve planets and counting,” SN: 8/19/06, p. 115, and this article). Pluto has a diameter comparable with the Earth’s moon. The size of our moon relative to Earth might cause any observer to consider Earth and its moon as double […]

    By Science News
  3. Health & Medicine

    Head to Head: Brain implants are better for Parkinson’s patients

    Parkinson's patients who get electrodes surgically implanted in their brains regain some muscle control and have improved quality of life.