A look at how a dung beetle standing on its head can roll a ball in a straight line; if egrets ever regret hanging out next to hungry alligators; and what ghostly creature was caught on camera 3000 feet below the ocean's surface.
The second episode of Andrew Marr's exploration of Darwin explores the impact of Darwin’s ideas on society and politics. Darwin’s first port of call on the Beagle was Salvador in Brazil – then a major port for the international slave trade. His experience there confirmed his enlightenment views of liberty and progress and his hatred of slavery. But his theory of evolution that began to take root on that epic voyage would describe a world of conflict, ruthless competition and struggle. It would be taken up and abused by some of the most reactionary movements of the late-19th and 20th centuries. The phrase “survival of the fittest” would help propel Darwin’s theory as a scientific justification for eugenics, enforced sterilisation and genocide. But after the Second World War, Darwin’s theory finds redemption in the United Nations statement on race which confirms Darwin’s long-held view that all humans are members of the same race and deserving of equal treatment. This is further reinforced in the extraordinary work of a small Jewish community in New York who used DNA testing and a voluntary and anonymous form of selective breeding to eliminate a debilitating disease from the Jewish community. DNA testing is the final frontier of Darwin’s Dangerous idea. But the lessons from history suggest that the new choices we face about what to do with the knowledge Darwin has given us when combined with genetics and DNA testing remains a major social and political challenge.
He gets up close and personal for the first time with a group of orphans and takes part in an ancient ceremony, before setting off into the bush in search of a herd to follow. Following potentially dangerous encounters with a buffalo and a pride of lions, Lev finds his first herd, but is forced to leave them alone when one threatens to charge.
The Comb-crested Jacanas are unique birds that use their long toes to walk delicately across lotus leaves and catch underwater prey. This episode, filmed between the rainy season and dry season in Kakadu, follows a father bird raising his chicks through their dramatic and difficult first year.