How the Canberra-based father-son music duo battled shyness, with robots and intergalactic beats. If you haven’t heard the robotic hip-hop sounds of Battlebird yet you’re missing out on something pretty good. Or, more fittingly, you’re missing out on some intergalactic sugar-rush style of intergalactic-boombox-pop. Say that three times fast! Better known as ‘the galaxy’s finest…