The US army says it has mothballed plans to deploy a robot developed in conjunction with Google because it is "too loud". The Legged Squad Support System, referred to by some as "the big dog," is capable of carrying 400lbs (181.4kg) of equipment over rugged terrain. But the US Marines now say its petrol-powered engine is too noisy for them to use in battle. ... The LS3 was developed by Boston Dynamics, a robotics firm acquired by Google in 2013 - as part of a tie-up with the Pentagon's research arm, the Defence Advanced Research Projects Agency (Darpa). The robot...