Historian Bettany Hughes selects eight pivotal days that defined the Roman Empire and its establishment as the world's first superpower.

National Geographic's landmark event series, The Greeks, brings together historians, archaeologists, actors, athletes, scientists and artists to launch a groundbreaking exploration into the ancient Greeks' journey - not just to better understand their past, but to discover how their legacy illuminates our present, and will shape our future. The story of the Greeks is the story of us.

Historian Bettany Hughes travels to India, Greece and China on the trail of three giants of ancient philosophy - Buddha, Socrates and Confucius.