Scientists crack 'impossible' galactic mystery as clearest-ever images of black hole edge revealed
Astronomers had long lacked the technology to solve the riddle - until now
Space
Mysterious cosmic ‘iron bar’ discovered by astronomers may reveal Earth’s grim fate
Scientists have suggested the 'unique' structure could reflect what our planet may look like after a devastating event
Nasa carries out emergency evacuation of ISS astronauts for first time in history
Crew are set to splash down off the California coast on Thursday morning
