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  • Handguns at a gun show in Las Vegas
  • illustration of New Horizons journey to Pluto
Your search has returned 7 articles:
  • Feature

    Gun research faces roadblocks and a dearth of data

    Buying a handgun in Connecticut means waiting — lots of waiting. First comes an eight-hour safety course. Then picking up an application at a local police department. Review of the application (which includes a background check and fingerprinting) can take up to eight weeks. If approved, the state issues a temporary permit, which the buyer trades in at state police headquarters for a permanent...

    05/03/2016 - 15:00 Science & Society, Mental Health, Health
  • Feature

    Rendezvous with Pluto

    View timeline

    Tiny, far-flung Pluto is about to have a visitor — at least for a few hours.

    On July 14, NASA’s New Horizons spacecraft will reach the dwarf planet and try to learn all it can about Pluto and its five known moons. Then the probe will leave Pluto behind, vanishing into the frigid darkness beyond the planets.

    In its wake, New Horizons will introduce Earth to the...

    06/12/2015 - 11:55 Planetary Science, Astronomy
  • News

    Largest known prime number found

    Editor’s note: This story was originally posted on Science News online as a Math Trek column September 20.

    Here’s a number to savor: 243,112,609-1.

    Its size is mind-boggling. With nearly 13 million digits, it makes the number of atoms in the known universe seem negligible, a mere 80 digits.

    And its form is tidy and lovely: 2n-1.

    But its true beauty is...

    09/28/2008 - 10:39
  • Math Trek

    Largest known prime number found

    Here’s a number to savor: 243,112,609-1.

    Its size is mind-boggling. With nearly 13 million digits, it makes the number of atoms in the known universe seem negligible, a mere 80 digits.

    And its form is tidy and lovely: 2n-1.

    But its true beauty is far grander: It is a prime number. Indeed, it is the largest prime number ever found.

    The Great Internet...

    09/20/2008 - 11:06 Numbers
  • Feature

    Mining the Sky

    The next really big observatory won't sit on a mountaintop or out in the desert. Nor will it fly aboard a spacecraft.

    Astronomers seeking the best views of the heavens have traditionally trekked to such remote outposts as the top of an extinct volcano in Hawaii or a desert in northern Chile. When they have needed to observe, say, one patch of sky over a broad range...

    02/23/2001 - 10:43 Astronomy
  • Feature

    Science News of the Year

    12/21/1996 - 00:00
  • Feature

    Friction Flicks

    05/30/1992 - 00:00