At first, the glitch was that gravity was weaker at cosmic scale than at solar system scale. But now they are saying that it is not just a glitch, and that we need a complete new understanding of the universe at large scale. We don't know what is dark energy and dark matter and we want to pretend to understand the universe at large scales.
That makes sense. Each model is a good approximation of phenomena at the scales we've observed so far. As we encounter new scales of space-time, we'll probably need new models to explain those phenomena.
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