For thousands of animals every year, migrating across Patagonia is the only chance of survival as they return to give birth and raise their young or come home to feed.

An orphaned honey badger’s journey to become the toughest hunter on the African savanna.

A caving expedition recently discovered a community of dwarf crocodiles living in the Abanda Caves, Gabon. The crocs are living in pitch darkness, hunt bats and some have bright-orange skin. Part of the original team returns to find out more about this bizarre phenomenon. It's mission impossible to access the crocs world and there's no way of knowing what they might find.