Nature highlights

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

• Quantum mechanics: Electron flow in two dimensions
• Superconductivity: Organic polymers enter the arena
• Obesity: Cholinergic regulation of appetite
• Superconductivity: Not the weakest link
• Lifespan: Ageing models
• Cosmology: Surveying the Universe
• Tectonics: Himalayas advance
• Optoelectronics: Leading light
• Evolution: Down time

8 March 2001 table of contents