Described as a once in a half century event by scientists, an enormous iceberg smashed into a peninsula of ice in Antarctica, causing the protruding ice shelf to break off and become an iceberg the size of Luxembourg. The now free-floating iceberg, measuring 50 miles long and 25 miles wide, is now teaming with the first iceberg to “fence” in ocean water in the region which could alter circulation patterns and affect the food chain for marine life. Scientists say emperor penguins and seals travel to the area to feed, but might have to swim further to find food if the icebergs reduce the local supply of fish.