Weekend Roundup

NASA's Mars Reconnaissance Orbiter has found more evidence of former water on Mars. (Gizmag)

iRobot has filed a patent for the Robot Fabricator, which can build machines form scratch, including itself. (io9)

Public radio discovers the numerous potential benefits of small unmanned aircraft. (PRI's The World)

China's new driverless car program could help sleepy drivers, reports say. (Straits Times)

The United Nations is looking into the Obama Administration's targeted killing program, which includes the use of unmanned aircraft. (Wired)