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This masterly account of Leonardo da Vinci and his vision of the world has long been recognized as the classic treatment of the Renaissance giant, offering unparalleled insight into Leonardo's intellect and vision at every stage of his artistic career.

Faced with the ceaseless stream of news about war, crime, and terrorism, one could easily think we live in the most violent age ever seen. Yet as New York Times bestselling author Steven Pinker shows in this startling and engaging new work, just the opposite is true: violence has been diminishing for millennia and we may be living in the most peaceful time in our species's existence. For most of history, war, slavery, infanticide, child abuse, assassinations, pogroms, gruesome punishments, deadly quarrels, and genocide were ordinary features of life. But today, Pinker shows (with the help of more than a hundred graphs and maps) all these forms of violence have dwindled and are widely condemned. How has this happened?

New York Times bestselling author Steven Pinker possesses that rare combination of scientific aptitude and verbal eloquence that enables him to provide lucid explanations of deep and powerful ideas. His previous books-including the Pulitzer Prize finalist The Blank Slate-have catapulted him into the limelight as one of today's most important and popular science writers.

Modern humans have been around for some 200,000 years, which is peanuts compared to some of the species alive today: there are creatures that have been with us since the Cambrian age and trees that have barely changed in the last 300,000 years. Natural history palaeontologist Richard Fortey investigates why certain life forms endure..

It is estimated that 99 per cent of species have become extinct and there have been times when life's hold on Earth has been so precarious it seems it hangs on by a thread. This series focuses on the survivors - the old-timers - whose biographies stretch back millions of years and who show how it is possible to survive a mass extinction event which wipes out nearly all of its neighbours. The Natural History Museum's Professor Richard Fortey discovers what allows the very few to carry on going - perhaps not for ever, but certainly far beyond the life expectancy of normal species. What makes a survivor when all around drop like flies? In this episode Professor Fortey focuses on a series of cataclysms over a million year period, 250 million years ago.

Harpy eagles are the most powerful birds of prey in the world. Standing three feet tall, with a six-foot wingspan and razor-sharp talons the size of bear claws, these birds are the heavyweight hunters of the South American rainforest. They are the top predators in the jungle canopy, feeding regularly on tree-dwelling mammals like monkeys and sloths. But scientists know very little about harpy eagles because their numbers are few and their habitat is large. Hidden in the branches of the canopy, they are rarely seen, let alone filmed. After locating a nest 130 feet above ground in an enormous Ceiba tree, wildlife filmmaker Fergus Beeley and his team of cameramen install a "nest cam" to monitor a harpy family. Over the course of a year, they struggle to document the lives of these elusive birds in Venezuela's Orinoco River jungle. The team comes dangerously close to the notoriously aggressive birds, risking serious injury for the chance to gain new insight into these Jurassic-like creatures. NATURE enters the secret world of the harpy, and provides a treasure trove of new information about this majestic species.