River of Extremes

S1 E1: 1The river that swallows all rivers - this is what the natives call it. In reality, the Congo, when considering its water masses, is the second largest and the deepest river in the world. At its source in the north of Zambia, it starts out as a mere trickle, but on its journey westwards it grows and grows, becoming ever mightier and with it, the animals, too.