Agence France-Presse: SCIENTISTS yesterday said they could no longer rule out a fast-track melting of the Greenland icesheet – a prospect that would see much of the world’s coastline drowned by rising seas. The researchers found that the great Laurentide icesheet that smothered much of North America during the last Ice Age melted far swifter than realised, dumping billions of tonnes of water into the ocean. The discovery raises worrying questions about the future stability of Greenland’s icesheet, …