A massive iceberg that got stuck and was helping to slow the loss of floating ice from the Thwaites glacier in West Antarctica has come free.
The iceberg, which started out roughly 85 kilometres (53 miles) long and 64 kilometres (40 miles) wide, originally broke away from the floating ice shelf formed by the glacier in March 2002, but got caught in a shallow part of the Amundsen Sea around 100 kilometres away.
Its presence had …