Vágner joins local experts on a mission to catch and tag white sturgeon to aid the species’ survival.
Lurking in the murky depths of the world’s great waterways are bizarre aquatic giants.
Professor Nick Eyles examines layers of earth and reveals the geologic journey that has shaped the planet.
From Alaska to California to Chile, Professor Nick Eyles studies how life along the two continents’ coastlines are under threat.
Images from the heart of the greatest river basin in the world.
See a mix of historical photos and dramatic images from the show.