"Down Under" was huge. This jokey ode to legendary Australian wanderlust helped Men at Work win a Grammy and was a key part of the band's creative legacy. By 2007, it had been earning Men At Work a steady stream of royalties for nearly 30 years. That was when a quiz show pointed out the song's subtle connection with an Australian nursery rhyme...

Tim Harford examines one of the most controversial copyright battles in music history. Where does inspiration end and infringement begin?

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Tim Harford is joined by Ben Walter, CEO of Chase for Business and the host of "The Unshakeables" podcast, to explore the story of the trailblazing Widow Clicquot. Her namesake brand la Veuve Clicquot revolutionized the champagne industry in the 19th century. Tim and Ben look at how she defied expectations and built one of the most iconic businesses in history.

This episode is sponsored by Chase for Business. For a full list of sources, see the show notes at timharford.com.

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Leah Washington and her new boyfriend Joe Pugh are on their first day out together. They're at Alton Towers theme park, where they've chosen to ride the "Smiler" rollercoaster: a terrifying tangle of track that loops and swoops through a world-record 14 inversions. Leah and Joe are seated right at the front of the train and, as they reach the highest point of the ride, they steel themselves for the drop. But then, quite suddenly, the ride stops.

Down on the ground, the computer system that controls the rollercoaster is warning that another carriage is out on the track, right in the path of Leah and Joe's train. The engineers are certain the computer is wrong...

Algorithms are often faster and cleverer than humans, and they can help us avoid accidents. But computers can make mistakes. When should we trust our own heads, instead of the machine?

For a full list of sources, see the show notes at timharford.com.

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