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  1. Left-Handed DNA

    DNA strands in living cells normally have a right-hand twist–just like a standard wood or metal screw. The Left-Handed DNA Hall of Fame, maintained by Tom Schneider of the Laboratory of Experimental and Computational Biology at the National Institutes of Health, offers an amusing compendium of examples in which illustrators have unwittingly depicted DNA incorrectly […]

    By Science News
  2. Math

    Prime conjecture verified to new heights

    Computations show that all even integers up to 4 x 1014 can be written as the sum of two prime numbers, lending support to the Goldbach conjecture.

    By Ivars Peterson
  3. Astronomy

    Comet LINEAR: Breaking up isn’t hard to do

    New images reveal that Comet LINEAR, which passed near the sun late last month, has broken into at least 10 fragments.