At about 1300ft thick, that's taller than the Empire State Building. Satellite imagery suggests the block had begun moving back in 2020 before becoming fully adrift in recent months. As a 23 A else its effect on sea level increases will be minimal. Floating objects displace their own weight in water, with small amounts of differences due to the salinity. Although researchers say it may threaten wildlife if it runs aground at the nearby island of South Georgia, they'll have to keep an eye on it