[Northkeep] Viking era navigation discovery

[Jennifer Carlson]

Viking era writings describe a "sun stone" which was used by navigators to find the sun on a cloudy or misty day.  A crystal that can refract light and be used to triangulate the position of the sun has been found on a 16th century British vessel, and seems to solve the mystery:
 
http://news.discovery.com/earth/navigating-by-sunstone-and-a-sixth-sense.htm
 
Cool stuff.
 
 
Talana