World's biggest iceberg breaks up after 40 years: 'Most don't make it this far'

'Megaberg' known as A23a has rapidly disintegrated in warmer waters and could disappear within weeksNearly 40 years after breaking off Antarctica, a colossal iceberg ranked among the oldest and largest ever recorded is finally crumbling apart in warmer waters, and could disappear within weeks.Earlier this year, the "megaberg" known as A23a weighed a little under a trillion tonnes and was more than twice the size of Greater London, a behemoth unrivalled at the time. Continue reading...