CNN: Scientists have raised concerns about a large, rapidly thinning glacier in Antarctica, warning it could contribute significantly to rising sea levels.
They say they've discovered two openings that could channel warm seawater to the base of the huge Totten Glacier and bring the threat of potentially disastrous melting.
The glacier is bigger and thinning faster than all the others in East Antarctica.
It contains enough ice to raise the global sea level by at least 11 feet (3.4 meters), according...