Hannah Fry journeys across islands, mountains and olive groves to reveal why ancient Greece was the birthplace of so many big ideas. She decodes the Parthenon's geometry, sails the Aegean with ancient tools, tries her hand at olive farming and is swept up in a riotous flour-throwing festival that blends ancient myth with modern identity.

Hannah explores Vietnam's remarkable post-war transformation, from moped chaos in Ho Chi Minh City to the muddy graft of prawn harvest in the Mekong Delta.