Nature Time

Watch mighty hippos and Nile crocodiles battle for survival in the place they both call home.

On the tiny Caribbean Island of Providencia, 400 miles from Colombia's Atlantic coast, a young female black crab is about to undertake the biggest mission of her life.

Persevere with a mother crocodile as she struggles to survive and raise her young in one of Africas most seasonally volatile and unforgiving rivers, the Katuma. Endure hunger and danger as she guards her clutch with ruthless precision.

New Zealand's west coast is like nowhere else. From glacier-covered mountains and rain-drenched native forests to rough frigid seas, the landscape defies belief.