Physicists sank a telescope 1.5 miles under the sea to put Einstein's relativity to the test

A half-built neutrino telescope on the floor of the Mediterranean Sea searched for cracks in one of physics' most basic invariances. It came up empty, but its limits…

A half-built neutrino telescope on the floor of the Mediterranean Sea searched for cracks in one of physics' most basic invariances. It came up empty, but its limits rival those of detectors many times its size.