But how exactly did they know where they were going? A recent study, focused on a set of medieval stone disks found in Ukraine, supports the belief that Viking sailors used solar compasses to navigate ...

His work ultimately led to the long-held Earth-centric's model being replaced with a heliocentric one that has the sun at the center of our solar system. Medieval Europeans saw alignments of ...

Though nothing quite like the artifacts has been identified before, they bear striking similarities to solar compasses made ... of the discs alongside medieval trade routes suggests communities ...