Times: One of Antarctica’s largest glaciers is thinning four times faster than thought ten years ago, it has been found. Satellite records show that if the melting of the Pine Island Glacier in west Antarctica goes on accelerating at current rates, the main section will have disappeared in 100 years, 500 years sooner than previously thought. The research showed that the ice surface is dropping at a rate of 16m a year.The faster melting affects 5,400sq km of the glacier, containing …