I envision a transparent semi-crystalline substance that can be written to by a laser or two. With the volume of a sugar cube, perhaps, with the longevity of am

I envision a transparent semi-crystalline substance that can be written to by a laser or two. With the volume of a sugar cube, perhaps, with the longevity of amber. Written down on the molecular level. Formatted to let 3D readers orient themselves to the playback, regardless of considerable distortion. Those who've seen the 60s George Pal version of "Time Machine" will remember The Traveller spinning a disk on a flat surface to activate a voiced playback. Still visionary.