• And they are just as prone to cultural fads as we are. Hell, a hundred years ago, standards of what was considered “attractive” were in many ways wildly different from today.

      It’s possible that Klingon features like the ridges and the double nostrils were for some reason highly susceptible to epigenetic pressure, and when they became unfashionable, they change within a generation or two.

      Let’s also not forget that in this universe, it is fairly trivial to heal scars completely and undergo radical cosmetic surgery. Perhaps nose jobs or ridge modifications became a rite of passage to signal allegiance to the new regime.