Can You Make a Sherman Tank Float?

How Civilizations Die - with Paul Cooper

As Governor of Britannia, Magnus Maximus has a huge army at his disposal, which is just what he needs to secure the Roman imperial throne. But perhaps the impressive general should have looked into the past before focusing on his future. Tim is joined by Paul Cooper, host of Fall of Civilizations Podcast [https://fallofcivilizationspodcast.com/], to explore why powerful civilizations such as the Assyrians, the Han dynasty and the Roman Empire all ultimately collapsed. Paul Cooper is the author of Fall of Civilizations: Stories of Greatness and Decline [https://blackwells.co.uk/bookshop/product/Fall-of-Civilizations-by-Paul-Cooper/9780715655481]. For a full list of show notes, see timharford.com [https://timharford.com/] See omnystudio.com/listener [https://omnystudio.com/listener] for privacy information.

Can You Make a Sherman Tank Float?

It’s D-Day and the Allies are about to invade Nazi-occupied France. For the landings to succeed, American soldiers on Omaha Beach will have to break through some formidable coastal defences - Hitler’s Atlantic Wall. Sherman tanks will come in very handy - and the Allies have come up with a novel solution for getting them to the beach. These tanks will swim. Everyone from Winston Churchill down thought swimming tanks were a great idea… but were they?  For a full list of sources, see the show notes at ⁠timharford.com⁠ [https://timharford.com/] See omnystudio.com/listener [https://omnystudio.com/listener] for privacy information.

The Inventor who Almost Ended the World (Classic)

Thomas Midgley's inventions caused his own death, hastened the deaths of millions of people around the world, and very nearly extinguished all life on land.  Midgley and his employers didn't set out to poison the air with leaded gasoline or wreck the ozone layer with CFCs - but while these dire consequences were unintended... could they have been anticipated? For a list of sources, see the show notes at timharford.com [https://timharford.com/] See omnystudio.com/listener [https://omnystudio.com/listener] for privacy information.

From Drilled: The Carbon Gold Rush

We usually bring you failures of the past, but today we're sharing an episode from someone who uncovers failures as they happen. Amy Westervelt is an award-winning investigative climate journalist and the host of Drilled, a true-crime climate change podcast exposing how corporate corruption and political operatives built decades of climate denial and delay. Each season unravels new evidence of deception, disinformation, and the power structures keeping real climate solutions out of reach. Drilled's latest season, Carbon Cowboys, examines a group of people who've turned climate policy into a profit engine. In September 2025, a group of Brazilian government ministers flew to North Dakota to watch a presentation on a new type of clean energy project, one that promised to help them deliver Brazilian President Lula’s dream of turning Brazil into “the Saudi Arabia of sustainable aviation fuels.” It was the latest in a string of projects from Midwest Republican kingmaker and corn ethanol magnate Bruce Rastetter, whose investments in Brazil might just transform him into a global carbon czar, even as his Summit pipeline carbon project faces fierce opposition from Iowa to North Dakota. Here's episode 1 of Drilled: Carbon Cowboys. Find Drilled wherever you get podcasts and hear episodes early and ad-free with a Pushkin+ subscription. Sign up on the Drilled show page [https://podcasts.apple.com/us/podcast/drilled/id1439735906] on Apple Podcasts or at pushkin.fm/plus [https://www.pushkin.fm/join-pushkin]. See omnystudio.com/listener [https://omnystudio.com/listener] for privacy information.

Angels, Gold and Lust: John Dee and the Philosopher's Stone (Part 2)

Part Two: When Tudor polymath John Dee meets a man who claims he can speak with angels, his path to understanding the universe suddenly becomes clear. At their instruction, the pair begin searching for the fabled philosopher's stone. But the angels grow increasingly demanding, and soon Dee must confront a terrible ultimatum. Centuries later, a strange incident in a French town suggests that angels may still be with us. For a list of sources, see the show notes at timharford.com [https://timharford.com/] See omnystudio.com/listener [https://omnystudio.com/listener] for privacy information.