ISS robot Dextre refuels satellites and other tech news Dextre, a Canadian-built robot has competed a satellite refuelling trial on the International Space Station. Currently, once they run out of fuel satellites become space junk, and nearly 200 of them are orbiting the planet, posing a risk of collisions. In other news, Yahoo sues Facebook over disputed patents and Encyclopaedia Britannica goes paperless. Dan Simmons presents these and other technology news stories.