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What do you get if you hurl a cloud of rubidium atoms, together with computer-controlled lasers and a magnetic coil, down an empty elevator shaft?

The answer is an exotic and fragile form of matter that is in just the right state to put a key assumption of Albert Einstein's theory of general relativity to the test.

It's a  safe bet that Einstein's assumptions will be proven correct.  To read the rest of the article, click here.

Category: Science