Uncategorized

  1. Math

    Constructing Domino Portraits

    In 1840, the Danish artist Christian Albrecht Jensen (1792–1870) was commissioned to paint a portrait of the renowned mathematician Carl Friedrich Gauss (1777–1855). This portrait, showing Gauss at the venerable age of 63, went on display at the Pulkowa Observatory in St. Petersburg, Russia, where it remains to this day. That painting of Gauss has […]

    By Ivars Peterson
  2. Tech

    Liberty’s smooth move

    Sensors clamped to the Liberty Bell's crack show that it could handle the stress of a move.

    By Jessica Gorman

  3. Putting Out the Welcome Mat: Chemical guides germ cells to gonads

    A chemical made in the gonads attracts the embryonic cells that will one day form eggs or sperm.