Andy Warhol created some of the most instantly recognisable art of the 20th century. But perhaps his greatest work of art was himself - the cool, enigmatic pop art superstar. Stephen Smith sets out to discover the real Andy Warhol - in the hour-by-hour detail of his daily life.
How did we become our planet's only global species, at home in every environment on Earth. Learn how our ancestors found a way through the deserts and out of Africa. Explore the meeting of Neanderthals and humans. And discover how we survived the Ice Age.