Microwave Drill Melts Concrete -- Plastic Mix Promises Big Displays -- Shake and Serve -- Small Jolts Move Artificial Muscle -- Speck-Sized Microscope Nears -- Chip Provides More Bang -- Labs-on-a-Chip Gain Micro Mixer -- Tiny Chain Revs Microdevices -- Rocket Chips to Propel Small Satellites -- Interactive Robot Has Character -- Cooperative Robots Share the Load -- Material Soaks up the Sun -- Metal Mix Boosts Batteries -- Fuel Cell Aimed at Handhelds -- Nanotubes Pack Power -- Sunlight Turns Water to Fuel.