> So what are you actually saying and why? Oooh, maybe I'm part of a sinister conspiracy to bring disrepute to Scandinavian history. No, I mean simply what I

> So what are you actually saying and why? Oooh, maybe I'm part of a sinister conspiracy to bring disrepute to Scandinavian history. No, I mean simply what I say: there is no proof for this conjecture (it's certainly not worth calling a 'theory') that sunstones were used by Vikings in navigation. Yet it keeps coming back. Every time I spend some time pushing back, but I'm getting weary of it, and perhaps I should let people believe in their crystals... As to the 'very very tiny leap of imagination', I am afraid I have to disagree. Look into something like the Bris Sextant if you want to learn more about a real, actually useful, simple device that can be used for navigation. It's fiddly as hell yet still way more practical than optical calcite.