Hobbits and Red Deer Cave people

Journalist and athlete Ade Adepitan continues his journey, travelling across central Africa from the coast of Gabon, through the Democratic Republic of Congo, and then on to Uganda.

Sir David Attenborough tells the story of the fossil discovery and reconstruction in Argentina of the largest known dinosaur, a new species of titanosaur. Measuring 37m long - close to four London buses put end to end - and weighing 70 metric tonnes, latest calculations show that this new giant titanosaur is the biggest animal ever to walk the earth.

An extreme mission to the unexplored volcanoes of one of the world's most dangerous areas. Can the team uncover secrets that could save countless lives? Towering above the hostile border between the Democratic Republic of Congo and Rwanda are the Virunga Mountains, home to some of the least explored volcanoes in the world. Continuous wars and devastating natural disasters have made these volcanoes impossible to reach. Now a team of brave scientists and mountaineers are on a mission to study one of the world's most dangerous areas.