I would get on with these guys!

Overall picture of the experimental apparatus where the Gravitomagnetic London Moment in rotating superconductors has been detected. Credits: ESA
Scientists funded by the European Space Agency have measured the gravitational equivalent of a magnetic field for the first time in a laboratory. Under certain special conditions the effect is much larger than expected from general relativity and could help physicists to make a significant step towards the long-sought-after quantum theory of gravity.

Towards a new test of general relativity?