Is dark matter's main rival theory dead? There's bad news from the Cassini spacecraft and other recent tests

One of the biggest mysteries in astrophysics today is that the forces in galaxies do not seem to add up.

Is dark matter's main rival theory dead? There's bad news from the Cassini spacecraft and other recent tests
One of the biggest mysteries in astrophysics today is that the forces in galaxies do not seem to add up.