Nature highlights

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

• Dear ET...
• Quantum music: Nice...
• The bioethical dilemma
• Californian underworld
• The wrong kind of rat
• Listen up
• Mimicry in action
• Evolving simplicity
• Tumour suppression
• Hypervirulent tuberculosis
• Genomics: Stick to the script

2 September 2004 table of contents