'Permanent bone loss': Calgary study finds astronauts suffer on return to Earth

FILE - Canadian astronaut Robert Thirsk talks with students from Rockcliffe Elementary School as they get a first look at The Living In Space exhibit during its unveiling at the Canadian Aviation and Space Museum in Ottawa on Thursday, May 12, 2011. (THE CANADIAN PRESS/Sean Kilpatrick) FILE - Canadian astronaut Robert Thirsk talks with students from Rockcliffe Elementary School as they get a first look at The Living In Space exhibit during its unveiling at the Canadian Aviation and Space Museum in Ottawa on Thursday, May 12, 2011. (THE CANADIAN PRESS/Sean Kilpatrick)

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Trudeau nominates Ontario judge Michelle O'Bonsawin to Supreme Court

Prime Minister Justin Trudeau nominated Ontario judge Michelle O'Bonsawin to the Supreme Court of Canada on Friday. She is the first Indigenous person chosen to sit on Canada's top court and the appointment is being celebrated as filling an important role at the highest level of the country's justice system.