As the article at Crev.Info puts it in a quote from the primary source:
“Maybe Newton was indeed wrong”, declares Professor Dr. Pavel Kroupa of Bonn University’s Argelander-Institut für Astronomie (AIfA). “Although his theory does, in fact, describe the everyday effects of gravity on Earth, things we can see and measure, it is conceivable that we have completely failed to comprehend the actual physics underlying the force of gravity”....and
Or one must assume that some basic fundamental principles of physics have hitherto been incorrectly understood. “The only solution would be to reject Newton’s classical theory of gravitation”, says Pavel Kroupa.This would wreak havoc on current cosmological models and concepts such as dark matter, dark energy, and the Big Bang theory.
What's amazing is that the High Priests of Science have been telling us for years that they have all the answers, and that some "facts of science" are beyond question. Kind of puts a big question mark on other "scientific claims", such as the claim that “evolution is a fact, like gravity,” doesn't it?