Nature highlights

Key research and analysis from this week's Nature magazine.

• Opening gambit: Voltage sensing by potassium channels
  
• Immune diseases: TALL story
• Astronomy: Extragalactic elements
  
• Planetary science: Meteorites under fire
• Magnetic insulators: Bose–Einstein crystals
• Materials: MgB₂ superconductivity
• Palaeogeography: Fossilized behaviour
• Immunology: Resistance at a cost
• Genomics: Anthrax bacillus genome
• Molecular biology: Pseudogene gets real function
• Insect communication: Butterfly beauty polarized

1 May 2003 table of contents