Back to the Future
THERE IS A kind of awe in imagining future technology; looking ahead and contemplating the things scientific advancement will someday enable us to do (assuming we survive that long). But sometimes I have the reverse feeling; a wonder at what human beings achieved with the supposedly ‘primitive’ means at their disposal in the past. We all know, for example, that ancient seafarers used the position of the sun to help navigate across the oceans. But what about when it was cloudy? A millennia ago, Vikings sailed and settled for thousands of miles across the expanses of the Arctic and North Atlantic, and reached as far as North America. Their legends mention mysterious ‘solar stones’, or sunstones; objects which enabled them to locate the sun even on overcast days. It is now…