Discovering the Jet Stream

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

In 1988, as floods struck Bangladesh and a heat wave swept across the United States, climate change became a political issue. Governments and businesses alike talked about how to stop it, or at least slow it down. That year the think tank World Resources Institute and the energy ...  Show more

Picture this: It's late 1944, and you, like thousands of other people on the west coast of North America, have noticed bizarre, jellyfish-like objects floating through the sky. You call the local authorities, maybe even the Air Force, only to be ignored. You don't see anything ab ...  Show more

At the height of the Mongol Empire, Kublai Khan set his sights on the island of Japan. He launched two enormous invasions of that nation in 1274 and 1281 - but both of them were defeated, aided by sudden and disastrous storms that tore his fleets apart. The story of these kami ...

We’ve gotten requests to talk about the balloon bombs that Japan used to target North America during World War II. But these were not the only balloons in use during the war, or the first balloons used for military purposes.

Research:

In this episode, historian Taylor Downing joins me to explore the remarkable work of reconnaissance pilots and photo interpreters during the Second World War. These daring aviators flew perilous missions over Occupied Europe, risking life and limb to capture the detailed aeria ...