Telegraph: The oceans are stirring. Deep beneath the sea, primeval forces have been unleashed that may engulf us all — unless we take to our boats to escape the rising tides. That, as it happens, is the plot of John Wyndham’s science fiction classic of the 1950s, The Kraken Wakes. But it also seems disturbingly close to what some scientists are now predicting. Once, rising sea levels were seen as a threat to distant coral islands: toodle-oo for Tuvalu, goodbye for the Gilbert Islands and …