"not-even-wrong speculations like string theory and loop-gravity with little testability. Shelly Glashow (Nobel Prize) has been quite vociferous about this. Of course that does not stop Brian Greene from making millions of dollars on purely speculative ideas - pretty though they are. BTW Brian, who I met at State of the World Forum in 2000 funded by Joe Firmage did borrow some ""cranky"" ""crackpot"" ""kooky"" ideas from me that he used in his NOVA PBS TV Show on ""The Elegant Universe"". For example Brian goes into a telephone booth to call ET! Compare to http://stardrive.org/cartoon/spectra.html  Also I introduced Jacques Vallee to Francis Ford Coppola in 1976 when I brough Uri Geller to one of his parties. Everyone was there and that's how Jacques became technical director on ""Close Encounters of the Third Kind"""