Physiology and development

• Biodiversity: On the origin of bar codes - Premium content

  Genetic sequences in a cell's mitochondria can be used to accurately determine species. Could this be because they are responsible for creating what they identify? Nick Lane investigates.

  18 November 2009

• Japanese science faces deep cuts - Premium content

  The government's election promises vowed more support for science, but so far budgets look set to shrink.

  17 November 2009

• Why pain sometimes lingers - Premium content

  Animals have nerves that can make a soft caress painful.

  15 November 2009

• Faster route to stem-like cells - Premium content

  All adult cells can be reprogrammed, researchers claim.

  8 November 2009

• Woo Suk Hwang convicted, but not of fraud - Premium content

  Cloning pioneer gets two years for embezzlement and bioethics breach.

  26 October 2009

• Hwang verdict imminent - Premium content

  Disgraced stem-cell researcher may face time in jail.

  21 October 2009

• Flies get fright from false memories - Premium content

  Scientists use light activation to pinpoint where learning happens in fruit flies.

  15 October 2009

• Chemical keeps male sex drive in check - Premium content

  A single pheromone ensures a male fruitfly's urge to mate targets the right sex.

  14 October 2009

• Oldest feathered dinosaur found - Premium content

  Chinese fossil find sheds light on evolution of birds.

  25 September 2009

• Toxicity testing gets a makeover - Premium content

  Europe aims to make chemical-exposure studies more predictive while using fewer animals.

  8 September 2009