For thousands of years downtown LA hid an indiscriminate killer - in one of the most surprising wildlife crime stories in the world, Natural World turns forensic detective to solve the mystery and unmask victims and killer. Features sabre-tooth cats, dire wolves and huge short-faced bears.

An insight into the origins of the iceberg that sank the Titanic. Created 15,000 years before the ill-fated ship, its development in the heart of the Greenland ice sheet is charted, from its dramatic birth through a 4,000-mile journey toward its date with destiny.