Weekly News Roundup: Greening the Red-Light District

• Hit the red-light district on the cheap: Berlin brothels are offering discounts to "green" customers that arrive on bike. • New robotic prosthetic hand lets users regain their sense of touch. • Do space flights make people crazy? The European Space Agency is looking for a few volunteers to spend 520 days in total isolation to study space travel's psychological effects. • Going green? Not if you own a pet. A new book argues that owning a dog has the same carbon footprint as driving 6,000 miles a year in a Land Rover. • Mix & match brains: Scientists try to create a bird chimera to study the evolution of birdsong.