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Canadarm has a broken wrist. Officially the Space Station Remote Manipulator System (SSRMS) but colloquially known as Canadarm2, it’s Canada’s most visible contribution to the International Space Station. Launched into orbit by a space shuttle in 2001 and attached to the station by Canadian astronaut Chris Hadfield and NASA astronaut Scott Parazynski, it was designed with a 15-year lifespan in mind. It’s almost twice that age now. “It’s ageing gracefully and showing signs of wear,” said Jason Dyer, Houston-based deputy liaison manager with the Canadian Space Agency, at a NASA...