The riches thought to lie beneath Greenland's icy terrain have been coveted for more than a century. But how easy are they to access, and will climate change make any difference? The allure of Earth's biggest island is undeniable. Over the past millennia, Greenland has captivated visitors, bringing everyone from Erik the Red, who founded the first European settlement over a thousand years ago, to the Allied Forces of World War Two to its isolated shores. (BBC News)