Lawrence Krauss summaries the present state of physics in The Trouble with Theories of Everything:
- There is no known physics theory that is true at every scale—there may never be.
- When quantum mechanics is combined with relativity, it turns out, rather unexpectedly in fact, that the detailed nature of the physical laws that govern matter and energy actually depend on the physical scale at which you measure them.
- So, what is going on? Is a universal theory a legitimate goal, or will scientific truth always be scale-dependent?
- There is no example so far where an extrapolation as grand as that associated with string theory, not grounded by direct experimental or observational results, has provided a successful model of nature. In addition, the more we learn about string theory, the more complicated it appears to be, and many early expectations about its universalism may have been optimistic.
But why is it not thinkable that relativity or quantum theory is not correct physics? My bet is relativity theory is incorrect physics, supported by in particular the fact that while quantum mechanics has been awarded a countless number of Nobel Prizes, none has been awarded to relativity theory, of course because nobody in the Nobel committee could ever understand anything of Einstein's curved space-time.
- I think I can safely say that nobody understands quantum mechanics.
It is maybe not necessary as scientist to be paralyzed by ideas and concepts beyond human understanding as characteristics of religion.