Here Comes the Sun . . . Stone 0
This is fascinating.
That’s because of a property known as birefringence, which splits light beams in a way that can reveal the direction of their source with a high degree of accuracy. Vikings may not have grasped the physics behind the phenomenon, but that wouldn’t present a problem.
“You don’t have to understand how it works,” said Albert Le Floch, of the University in Rennes in western France. “Using it is basically easy.”
Some persons are skeptical, with reason, given that the Vikings left little evidence of how they managed to navigate across wide stretches of the Atlantic.
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