Ultracold atoms in space will let us stress test Einstein's relativity
Potassium and rubidium atoms aboard the International Space Station have been cooled almost to absolute zero to put a fundamental principle of Einstein’s general theory of relativity to the ultimate test
United States Timothy Kovachy At Northwestern University German Space Agency Naceur Gaaloul At Leibniz University Hannover Cold Atoms Laboratory International Space Station
Source: newscientist.com