February 2007

• Graphene steps up to silicon's challenge

  Tiny transistor uses a single electron to turn off and on at room temperature.

  28 February 2007

• Electric switch could turn on limb regeneration

  Tadpoles use a proton pump to direct tissue regrowth.

  28 February 2007

• Pluto mission stops off at Jupiter

  NASA flyby makes for pretty pictures.

  28 February 2007

• Big green buyout

  Texan takeover may signal changes in the way America generates electricity.

  27 February 2007

• The more, the wikier

  The secret to the quality of Wikipedia entries is lots of edits by lots of people

  27 February 2007

• South Africa expected to propose elephant cull

  Public consultation could suggest killing to control population.

  27 February 2007

• Scientists kick off huge polar research plan

  International Polar Year will feature more than 220 separate projects.

  26 February 2007

• Mars — worth a detour

  Europe's Rosetta mission is still years from its cometary target, but has sent home some pretty pictures of Mars en route

  26 February 2007

• Balls finally dropped into mud volcano

  Indonesian physicists have started deploying chains of concrete balls in an attempt to stem the flow of mud in East Java.

  26 February 2007

• Ancient DNA solves milk mystery

  Analysis of fossilized bones suggests milk-drinking mutations emerged after dairy herding.

  26 February 2007