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It turns out that "nothing" is one of the most interesting somethings in all of physics. Signup for your free trial to The Great Courses Plus here: http://ow.ly/OOOp30beNyt

Note: There is a correction in this video that has been addressed in the pinned comment below.

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How do we study nothing? An empty jar still contains something: molecules of air and a bath of infrared light from its warm environment. But what if we suck out every last molecule of air, chill the jar to absolute zero, and shield it from all external radiation? The jar would contain only empty space, but it turns out that empty space is far from nothing.

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