The space.com report concludes, "But what if some aspect of dark gravity proves that Einstein simply got it wrong? "If we discover a new gravitational phenomena, then we will realize that Einstein's theory has a similar role to Newton's theory," Caldwell said. "That it's a beautiful theory that leads to testable predictions with high accuracy, but it's only valid in a certain domain, a certain range of validity — at which point it gives out to yet another theory."
I would think all the quantum stuff used now in cosmology also has a *certain domain, a certain range of validity* yet in various reports, the quantum is applied to the macro to explain the origin of everything we see today
So using inflation model of Alan Guth, the universe begins about 10^-36 second after BB event and expands into the universe today some 10^17 second later (time expands by at least 10^53 order of magnitude or more since the *beginning*) with the universe today at least 93 billion light years in diameter. It would be interesting to see when and where (size of the universe compared to present size) all the dark energy, dark gravity, dark matter, etc. popped up into existence going back to Planck time and Planck length or perhaps even earlier than Planck time and smaller than Planck length (thus sub-Planckian universe thinking). Alan Guth provided a scaling relationship where 10^-53 meter size (at inflation) is mapped to 1 meter size today and time at 10^-36 second when inflation begins. Applying this scale relationship to when and how big the universe was to all the dark cosmology items listed today (like this space.com report list) would be very interesting to read about.
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