In 2019, an international team began monitoring Greenland's Petermann Glacier's floating ice tongue from space. 7 years later, 76.4 sq km broke away, creating a Manhattan-sized ice island, while two more could reduce the tongue by 254 sq km

For seven years, scientists have been watching Greenland's Petermann Glacier from space, tracking cracks and other signs of instability in its floating ice tongue.

That long-running monitoring captured a major break on August 4, when a 76.4-square-kilometre section of the glacier's floating ice tongue broke away, creating a huge tabular iceberg roughly the size of Manhattan, as per a report.