The continent of Antarctica is warming up in step with the rest of the world, according to a new analysis. Scientists say data from satellites and weather stations indicate a warming of about 0.6C over the last 50 years. Writing in the journal Nature, they say the trend is "difficult to explain" without the effect of rising greenhouse gas levels in the atmosphere. Meanwhile, scientists in Antarctica say a major ice shelf is about to break away from the continent. The Wilkins Ice Shelf is said to be "hanging by a thread" from the Antarctic Peninsula, the strip of land pointing from the white continent towards the southern tip of South America.