Frozen giant breaks loose from ice shelf

Trillion-ton iceberg sparks debate over climate change factor

MELBOURNE, Australia - One of the biggest icebergs ever recorded, a trillion-ton behemoth more than five times the size of Hong Kong, has broken off Antarctica, triggering disagreement among scientists over whether global warming is to blame.

The event, captured by satellite, happened sometime in the past few days when the giant chunk snapped off an ice shelf.