[zmgsabst]

LIGO proved there is an aether and density ripples in it change the distance that light travels — as shown by a characteristic oscillation generated by dense objects colliding causing interference between the arms of LIGO.

The reason MM failed to show that light changes speed is because we’re not moving through the aether, but are ourselves aether stuff — and so our own perspective gets equally warped. Since us and the light both change with the relative motion, we can’t see the change.