'Permanent bone loss': Calgary study finds astronauts suffer on return to Earth
The TBone study, conducted over a seven-year period starting in 2015, found that prolonged weightlessness accelerated bone loss in the astronauts.

The TBone study, conducted over a seven-year period starting in 2015, found that prolonged weightlessness accelerated bone loss in the astronauts.
In a blow to the fight against climate change, the U.S. Supreme Court on Thursday limited how the nation's main anti-air pollution law can be used to reduce carbon dioxide emissions from power plants.
Activists rallied outside David Eby's Vancouver office calling on the B.C. attorney general to drop criminal charges against Wet'suwet'en land defenders.
European Union countries reached a deal following hard-fought talks that dragged into early Wednesday to back stricter climate rules that would eliminate carbon emissions from new cars by 2035.
Authorities in Austria declared a civil emergency Wednesday after some villages in the southern state of Carinthia were cut off by mudslides and flooding following heavy rainfall. One person was killed and another was reported missing.
Pounding rain following weeks of heavy downpours triggered a mudslide in northeast India that killed at least 14 people and left more than 30 others missing, authorities said Thursday.
More than seven million people in Bangladesh are in desperate need of shelter and emergency relief after what one aid agency has described as the worst flooding to hit South Asia in living memory.
Ontario's new natural resources minister, former Bracebridge mayor Graydon Smith, is facing a hearing to determine whether he harmed a threatened turtle species when he was the mayor of the small town.
Members of the Group of Seven major economies pledged Tuesday to create a new 'climate club' for nations that want to take more ambitious action to tackle global warming, putting them on a possible collision course with China.
A year after the heat dome event that killed billions of plants and animals in British Columbia, scientists say ecosystems are recovering, but could be transformed forever if such events become more frequent.