Why do people still waste time and money on these post hoc theories of Dark Matter / Dark Energy, which were invented to explain anomalies in the conventional cosmological model like galaxy rotation curves?
We neither have direct evidence nor do we not have alternative explanations - to the contrary. They shouldn't even qualify as scientific theory, since they are neither falsifiable, have no predictive power or are supported by any independent experimental confirmation.
Oh,there are presents under the Christmas tree, it must've been Santa Claus!
They are patchwork "solutions" at best and by far not the only explanation for what's happening.
It's the aether rehashed.