Report: Futuristic copper foam batteries get more bang for the buck

People use their GPS apps, cameras, and mobile internet to navigate strange cities in search of good coffee, record "selfie" commentary while they wait in line, and upload their videos directly to social media sites while they sip their latte. But no amount of high-tech savvy can save a well-loved device from dying when its battery is drained.

Robot builds itself with foam

Roboticists at the University of Pennsylvania’s Modlab have built a robot that can build and repair other robots - and even itself - using modular parts and spray-on foam.