Features

• Tracking an Ancient Killer

  The case was cold--the bones in the mass grave were 70 million years old. But critical clues pointed to the killer's identity

  Raymond R. Rogers and David W. Krause   | February 1, 2007  | 1

• Spice Healer

  An ingredient in curry shows promise for treating Alzheimer's, cancer and other diseases

  Gary Stix   | February 1, 2007  | 9

• Methane, Plants and Climate Change

  The surprising recent finding that living plants produce methane does not throw doubt on the cause of global warming. Human activities--not plants--are the source of the surge in this and other greenhouse gases

  Frank Keppler and Thomas Röckmann   | February 1, 2007  |

• Digital TV at Last?

  Analog TV broadcasting is set to end in two years, but its legacy could make the digital transition anything but smooth

  Michael Antonoff   | February 1, 2007  |

• Molecular Lego

  A modest collection of small building blocks enables the design and manufacture of nanometer-scale structures programmed to have virtually any shape desired

  Christian E. Schafmeister   | February 1, 2007  |

• The Universe's Invisible Hand

  Dark energy does more than hurry along the expansion of the universe. It also has a stranglehold on the shape and spacing of galaxies

  Christopher J. Conselice   | February 1, 2007  | 6

• Making Silicon Lase

  Scientists have at last persuaded silicon to emit laser beams. In a few years, computers and other devices will handle light as well as electrons

  Bahram Jalali   | February 1, 2007  |