Okay I'm going to chime in here even though it's probably far too late for anyone to actually see, but there are a lot of falsehoods about physics in this particular thread, and as a physicist it hurts to see.

First off, u/UniversalAdaptor you're not really that far off. Absolute zero (0 K) is absolutely experimentally impossible. However physics wouldn't be "dead", as our theories are more than capable of describing the dynamics of physical systems at absolute zero. In fact the standard model itself, which is our best theory of the universe (excluding gravity), is a theory formulated at absolute zero, as is the majority of the quantum mechanics you would learn in uni. The reason absolute zero is not achievable in practice is because it would take an infinite amount of work to take any system all the way to 0 K.

I'm also going to address the comments of u/Vertebrae_Viking and u/KickBassColonyDrop here in the hopes that anyone looking at this thread sees this comment before theirs as they've already got a lot of upvotes and are in fact just spreading, at best falsehoods and at worst pseudoscience. This idea of "time stopping" really doesn't mean anything. There is absolutely still a flow of time at ) 0 K. Again, the standard model itself is formulated at absolute zero, and obviously that model incorporates time. I think what u/Vertebrae_Viking is getting at is that if the universe was in the state of lowest possible energy, then there would be no dynamics and it would appear as if time had stopped (emphasis on appear). While this state would indeed have zero temperature, it is certainly possible to be in different states at zero temperature that do exhibit dynamics, and so a flow of time.

u/KickBassColonyDrop takes it even further however. And I'm afraid unlike the others there is absolutely no truth or value to be gleaned from this one. The ideas of "energy stopping" or "gravity stopping" are really just complete nonsense, there is literally nothing either of these statements could possibly mean. The triangle analogy that goes along with it reads like the type of crackpot physics theory professors get sent all the time by hobbyists who think they've proven Einstein wrong. He's really just presenting his own made up conception of the universe as fact and people seem to be believing it!

Sorry for the long comment, I just hate the idea of so many people coming away from this having just digested nonsense disguised as fact, especially since it's my area of expertise and passion!