Depending on where we look, the universe is expanding at different rates. Now, scientists using the James Webb and Hubble space telescopes have confirmed that the observation is not down to a measurement error.
That’s because alternative models like MOND or string theory end up breaking more things than they solve. Fixing the leak in your roof is great, but doing so by breaking the living room wall isn’t really an acceptable solution.
In optimization problems, you can get stuck at a local maxima. It looks like any direction you go makes things worse. But the only way out of that is to try something that does make things worse and try refining from there to see if you can get to something better. Maybe that living room wall does need to come down in the process.
That’s because alternative models like MOND or string theory end up breaking more things than they solve. Fixing the leak in your roof is great, but doing so by breaking the living room wall isn’t really an acceptable solution.
In optimization problems, you can get stuck at a local maxima. It looks like any direction you go makes things worse. But the only way out of that is to try something that does make things worse and try refining from there to see if you can get to something better. Maybe that living room wall does need to come down in the process.
Isn’t string theory basically dead at this point?
It works perfectly as long as you assume there are a bunch of extra spatial dimensions that can’t be seen…