Summary: In This Episode: Sprint to launch Wi-Fi calling, but slowly, Facebook to buy WhatsApp for $19 billion, What to Expect at Mobile World Congress 2014, Scientists Create A Powerful Muscle Fibre From Fishing Line And Sewing Thread, Thermoelectrics Get Big Boost From Nanoscale Pillars — Creating Electricty From Heat, Mars rover Curiosity drives backward to test its skills and wheels, Advanced telescope lets NASA see inside supernovas
