An iceberg the size of Luxembourg has broken off from a glacier in Antarctica after being rammed by another giant
iceberg, scientists said on Friday, in an event that could affect ocean
circulation patterns.The 2,500 sq km (965 sq mile) iceberg broke off earlier this month from the
Mertz Glacier's 160 km (100 miles) floating tongue of ice that sticks out into
the Southern Ocean.The collision has since halved the size of the tongue that drains ice from the
vast East Antarctic ice sheet.