Viking Telescope

Research on lenses discovered at a Viking archaeological dig on the island of Gotland provides evidence that the Norse may have had sophisticated navigational instruments as early as the 11th century.

The "Visby" lens, one of ten rock crystal lenses discovered in the 1990s, may have been used for magnification or may have been part of a telescope, according to scientists.

Thanks to THL Francesca de Onorati for her "discovery" of this story.