Classical Physics breaks in three situations: if it’s too fast, too massive, or too tiny. To address that, new theories appeared. Among them:

• special relativity - handles fast stuff
• general relativity - handles fast and massive stuff
• quantum mechanics - handles tiny stuff
• quantum field theory - handles tiny and fast stuff

What researchers are looking for is a theory that is able to handle all three things at the same time, superseding both the relativities and the quantum theories. That’s the Theory of Everything that everyone is looking for. (Except me. I’m looking for my cup of coffee.)

And most people look for it in a specific way: they try to adapt relativity to quantum phenomena. Those researchers however are doing something different: they’re imposing a limit on the quantum theories, saying that they break under specific situations, because spacetime would work more like in classical physics than like in quantum mechanics - in other words that quantum theories need to be fixed to relativity, not the opposite.

The researchers then devised a stupidly simple experiment to test their hypothesis out.

General rule, 1-2 orders of magnitude more sensitive than we have now.

Which is bonkers considering we’re really close to exact when we measure things like the weight of individual atoms… But we measure using things like the energy the atom releases when being smashed at close to the speed of light. All those measurements have some inaccuracy that stacks, even if the math is precise, so it’s, analogous to using 22/7 in place of pi. you need 10x more granularity to register that pi is 3.141… and not 3.142… need new inventions in the way to measure to know for sure.