Theodosia Okoh: Designer of Ghana’s flag

During the Vietnam War, North Vietnamese VietCong guerrillas built a vast network of tunnels in the south of the country as part of the insurgency against the South Vietnamese government and their American allies. The tunnel network was a key base and shelter for the North Vietna ...  Show more

During the 1940s, a playboy spy became one of wartime’s most successful double agents, as well as the reported inspiration behind James Bond. A gambler and womanizer who spoke several languages, Dusko Popov was approached by a friend working for the Abwehr, Germany’s military int ...  Show more

Correction: Our staff producer pronounced the the Japanese word "ōbōn" incorrectly in this episode. It is pronounced OH-bohn not oh-BAHN.Let us be the first to wish you a Happy Flag Day, beautiful nerds! Anyone who has listened to 99% Invisible regularly knows we have a thing for ...  Show more

13 equal horizontal stripes in red and white, with a navy blue square in the top left bearing 50 small white five pointed stars. It's recognisable the world over as the flag of the United States of America.

But how did this become the American flag? When did it devel ...

Betsy Ross sewed the first American flag. At least, that's what we were taught in school. But when historians go searching…there’s no proof to be found. In this collaboration with the podcast Sidedoor, we unravel this vexil ...

How a bloody 1960s revolution changed East Africa. We hear an eyewitness account and talk to Professor Emma Hunter of Edinburgh University. Plus the birth of ecotourism in Costa Rica, the post-war origin of the World Health Organisation, the man who created the world's first ...