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OSIRIS-REx spacecraft rehearses touching down on asteroid Bennu, deep sea vents could have kick-started life, and star orbiting the supermassive black hole moves as predicted by relativity, plus interview with astronomer Riley Connors

OSIRIS-REx spacecraft rehearses touching down on asteroid Bennu, deep sea vents could have kick-started life, and star orbiting the supermassive black hole moves as predicted by relativity, plus interview with astronomer Riley Connors

NASA’s first asteroid-sampling spacecraft is one step closer to touching down on asteroid Bennu. By mimicking rocky seafloor chimneys in the lab, scientists have produced new evidence that these features could have provided the right ingredients to kick-start life. A...