Just the way that strings and extra dimensions, universes are mathematically compelling, they still are merely theoretical and can't be proved. Whereas, concepts such as entanglement which is so fascinating if one thinks about it, molecules interfering with molecules without any connection... cannot be proved theoretically, no-one knows why it happens, experimentalists got the Nobel because they proved it and proved a lot of scientists wrong.

Does anyone else get the irony of this? The actual concepts that are theoretical in physics cannot be proved, and the concepts that are getting proved aren't justified with theoretical physics.