I am surprised that the Vikings didn’t discover this first. The Vikings did, after all, develop a sun compass for use on sunny days and used sunstones to find the direction of the sun when it was overcast. One might … Continue reading
I am surprised that the Vikings didn’t discover this first. The Vikings did, after all, develop a sun compass for use on sunny days and used sunstones to find the direction of the sun when it was overcast. One might … Continue reading