 In the age of exploration, navigators set out to discover the world. They sailed the oceans, charted trade routes and mapped so-called discovered lands, some of which, it turns out, they made up. There was no one to question these white European sea captains. Their word was not to be doubted. If you're sailing for the British Admiralty and you come back and say, I spot an island, it goes on the map. Fast forward to the 21st century, and now climate change is wiping places off the map. In the South Pacific, entire islands and historic ways of life are disappearing. There's this particular fish that they like to eat, that they like to catch off the coast of their island, but they're no longer able to do that in Honiara. And now they have to buy like tinned fish. I'm Ann Strainchamps. Today, on to the best of our knowledge, off the map.