# experimental bounds on spacetime torsion

Did Gravity Probe B provide any bounds on Einstein-Cartan torsion? is a non-zero torsion value at odds with the results regarding frame-dragging and geodetic effects?

-
+1 for question. My own dilettante understanding is that torsion is localised and correspond to angular momentum, i.e. spin. So I guess that unless someone had been making precision measurements of magnets it's hard to observe. – genneth Oct 8 '11 at 21:33