April 2011 IssueBusinessData cycle: Behind MIT’s SENSEable Cities LabBy Ian DalyGearIn pictures: Beautiful music machinesBy WIRED InsiderBusinessDisrupting poverty: How Barefoot College is empowering women through peer-to-peer learning and technologyBy Greg WilliamsBusinessIn depth: How Rovio made Angry Birds a winner (and what's next)By Tom CheshireGearObjects of desire: April 2011By Chris FinnamoreBusinessFaster: Can a wind-powered craft move faster than the wind that pushes it?By Adam FisherScienceWhat’s inside: MarmiteBy Dr John EmsleyCultureZaha Hadid's Guangzhou opera house: Reshaping sounds with wallsBy Herbert WrightScienceHow to send a homemade rocket into orbitBy Andrew LowryCultureHow to make an ice sculptureBy Matt HusseyScienceMind controller: What is the 'burundanga' drug?By Vaughan BellCultureHow LA Noire took videogame motion capture to the next levelBy Oliver Franklin-WallisScienceIce-fishing for cosmic particles at the IceCube Neutrino ObservatoryBy Tom CheshireScienceA £400,000 PC downgrade: Rebooting Babbage’s Analytical EngineBy Duncan Graham-RoweScienceAim high with a grapple gunBy Jim HillCultureMario dissected: Visualising the guts of gaming's greatestBy Charlie BurtonGearHands-free combat: The next generation of fighter-pilot helmetsBy Jim HillScienceHow Cynthia Breazeal is teaching robots how to be humanBy Tom CheshireBusinessMy gadget guilt: Inside the Foxconn iPhone factoryBy Joel JohnsonBusinessHow Quora became the hottest website of the yearBy Neal PollackBusinessElizabeth Varley: Silicon networkerBy João MedeirosCultureHow Warren Ellis is using torchlight for his latest comic, SVKBy Charlie BurtonGearHow to beat a polygraph testBy Mark Russell