Thwaites Glacier and much of the West Antarctic Ice Sheet could be lost by the 23rd century, according to findings from British Antarctic Survey (BAS) researchers and their colleagues. The glacier spans an area equal to the size of Great Britain and in places is more than 2,000m (6,500ft) thick, making it one of the largest in the world. Its total collapse would cause sea levels to rise by 65cm. The team of UK and UK researchers, who met at the BAS in Madingley last week, say Thwaites Glacier is due to retreat further and faster than it has been doing. They have uncovered a complex and rapidly…