Telegraph: Scientists have known for a long time that a rise in temperature in the oceans could cause the South Pole to start melting. However two studies published in the journal Nature have found new evidence of the Antarctic ice sheets collapsing in relatively short periods of time in the past. They predict that if there is a rise in temperature of five degrees Celsius or more in the oceans by the end of the century, the huge West Antarctic Ice Sheet would begin melting. This could …