Faultlines, black holes and glaciers: mapping uncharted territories

In the era of satellites and Google Maps there are still areas that remain a mysteryOn a quiet summer evening, the Aurora, a 60ft cutter-rigged sloop, approaches the craggy shore of eastern Greenland, along what is known as the Forbidden Coast. Its captain, Sigurdur Jonsson, a sturdy man in his 50s, stands carefully watching his charts. The waters he is entering have been described in navigation books as among “the most difficult in Greenland; the mountains rise almost vertically from the