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LISA Pathfinder Mission Exceeds Expectations

When the most massive objects in the universe collide, you'd expect some fanfare. But these objects - black holes - are so dense not even light can escape, so there's a bit of a "if two black holes collide and no one sees it, did it happen?" vibe.   But there is one thing that's immune to their gravitational grasp and scientists have been dreaming about finding it for a century - until this year.  They're called gravitational waves.   In 1916,...

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