[SunkenCiv]

https://freerepublic.com/tag/sunstone/index

https://freerepublic.com/tag/sunstones/index

[SunkenCiv]

• Mythical Viking Sunstones Could Have Worked [04/04/2018]
• Incised stone sun discs found during Danish island excavations [08/15/2015]
• Researchers suggest Vikings used crystals with sun compass to steer at night [03/29/2014]
• Researchers: We may have found a fabled sunstone (Update) [03/08/2013]
• Icelandic rocks could have steered Vikings [11/01/2011]
• Did Vikings navigate by polarized light? [01/31/2011]
• How Vikings May Have Navigated On Cloudy Days (More) [03/02/2007]
• Crystals 'helped Viking sailors' (For Viking fans....and others, of course). [02/07/2007]

[Vaduz]

Thanks I saw a documentary on it amazing how they had the ability to do so many things.