Cautionary Tales with Tim Harford

In Goiânia, Brazil, a junk dealer acquires an old medical device from two scrap-metal scavengers. The device itself isn't useful, but it comes with precious lead which will fetch him good money. There's something else inside the device, too: a curious, crystal-like substance that glows bright blue in the dark.

At first, the dealer is mesmerized by it: he wants to turn it into jewelry for his wife. But, everyone who comes into contact with the magical glitter seems to get sick. His own family succumbs to nausea and vomiting. A doctor suggests food poisoning - but this isn't like any food poisoning they've ever known before. And soon, the whole city is contaminated.

No-one saw this horrifying radiation accident coming. Should they have?

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

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Cautionary Conversation: Just before Christmas 1799, President George Washington was riding around his country estate, Mount Vernon, when it began to snow. When he arrived home, guests were waiting for him. Known for his punctuality, he hurried to entertain them -  still clad in his damp clothes.

The next morning, Washington had a sore throat and a chesty cough. His family decided to take a fateful step: they summoned a doctor.

Tim Harford is joined by comedians Dave Anthony and Gareth Reynolds, hosts of the hugely popular history podcast The Dollop. They discuss the parade of doctors that tended to the ailing Washington, and the various remedies they prescribed - from lamb's blood to a collar of beetles. Tim, Dave and Gareth also look at what happened when cars first hit the streets in the early twentieth century: why did so many cars "turn turtle"? Who were the first jaywalkers? And which British inventor rode around in a giant white stiletto?

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William the Conqueror undertook a remarkably modern project. In 1086, he began compiling and storing a detailed record of his realm: of where everyone lived, what they did and where they came from.

900 years later, the BBC began its own Domesday project, sending school children out to conduct a community survey and collect facts about Britain. This was a people?s database, two decades before Wikipedia. But just a few years later, that interactive digital database was totally unreadable, the information lost.

We tend to take archives for granted ? but preservation doesn't happen by accident; digitisation doesn?t mean that something will last forever. And the erasure of the historical record can have disastrous consequences for humanity...

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

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On The Dream, host Jane Marie gets to know the life coaches and gurus who claim they know the secret to living our best lives. Is it all in our mindset? Or our privilege? Or are we all under a spell?

Tim Harford is joined by Jane Marie to talk about who coaching works least well for. Turns out it?s the exact people who could benefit most from it, according to the industry. Dr. Sherman James and Dr. Arline Geronimus discuss the downsides of positive thinking, bootstrapping, and mindset culture. For some people, striving has negative impacts on health and happiness.

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Henry Roan has been shot through the back of his head. The local authorities have found his body slumped over the steering wheel of his car. There's no gun at the scene: this is no suicide - it's brutal murder. And the man who ordered Henry Roan's killing? He claims to be his best friend...

Former Principal Chief of the Osage Nation Jim Roan Gray joins Tim Harford to speak about his great-grandfather Henry Roan. They also discuss the Osage Nation today and Jim's take on the new film Killers of the Flower Moon, directed by Martin Scorsese.

This episode of Cautionary Tales was produced in association with Apple Original Films. Killers of the Flower Moon stars William Belleau as Henry Roan, Robert DeNiro, Leonardo DiCaprio and Lily Gladstone.

Do you have a question for Tim? Please email any queries you might have, however big or small, to [email protected].

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Minnie Smith grew sick quite suddenly. She had been young, fit and healthy - and the doctors were baffled when she died. "A peculiar wasting illness," they called it. Then, her sister Anna went missing. Her rotting corpse was found a week later, a bullet hole through her skull. When a third sister, Rita, was blown up in her own bed, a grim pattern was clear: the family was being targeted.

Lawman Tom White strode into town to investigate - and uncovered a vicious plot that chilled him to the bone...

This episode is based on David Grann's book, Killers of the Flower Moon, and is the first of two cautionary tales produced in association with Apple Original Films. The film of the same title is in movie theaters now. It's directed by Martin Scorsese and stars Robert DeNiro, Leonardo DiCaprio and Lily Gladstone.

Next week, we'll hear more on this story from former Principal Chief of the Osage Nation Jim Roan Gray.

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This week, we've twice the storytelling fun for you: two Cautionary Tales shorts, previously only available to Pushkin+ subscribers.

A Monkey for Mayor: It was supposed to be a publicity stunt, but when the man who dressed as Hartlepool United?s monkey mascot stood in a mayoral election... he won. Actual politicians predicted disaster - since thousands of workers and millions of dollars were now in the hands of a complete novice.

But H?Angus the Monkey proved to be a more effective leader than anyone had predicted, raising interesting questions about how we select the best people to be our managers and our mayors.

And

A Screw Loose At 17,000 Feet: Can you tell the difference between an A211-7D bolt and an A211-8C? Well, nor could the tired and stressed engineer fitting a cockpit windshield to Flight 5390. The difference is tiny, but the consequences of muddling them up - which played out at 17,000 ft - were dramatic.

Such design flaws are common - and result in far more loose aircraft windows than you would imagine.

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Why are board games so popular in Germany? What?s Tim Harford?s top tip for productivity? And where do all those sound effects come from?

Tim is joined by Cautionary Tales? very own wizard of sound Pascal Wyse, to read your emails and answer your questions.

Do you have a question for Tim? Please email any queries you might have, however big or small, to [email protected].

Please note that some emails in this episode have been edited for length.

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The longest running television series of the 20th century was Gunsmoke, a western set in the notorious Dodge City, Kansas. Malcolm sweeps away mountains of legal scholarship to make a bold claim: The simplest explanation for the Supreme?s Court?s puzzling run of gun rights decisions may be that the justices watched too much Gunsmoke when they were growing up. Enjoy this episode from Revisionist History, another Pushkin Industries podcast.

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1957. Jørn Utzon receives a phone call: he's just won an international competition to design a brand new opera house for the Australian city of Sydney. Utzon is unknown in the field, so this is a triumph. The young architect couldn?t have imagined what a bitter victory it would turn out to be...

The Guggenheim in Bilbao; the Burj Khalifa in Dubai; the Shard in London. These days, everyone seems to want an iconic building. But Sydney Opera House was the first, the greatest ? and the most painful. It's now fifty years since the Opera House was opened. This is its origin story.

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

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Cautionary Book Club: When Morgan Stanley offered to lease Chicago's parking meters for the princely sum of $1 billion, the City Council were convinced that they had struck gold. They hastily signed the deal. But they soon learnt that they hadn't just traded away parking revenue - they had traded away the streets themselves...

In this hybrid episode of Cautionary Tales, Tim Harford first tells the story of the Chicago parking metres fiasco of 2008. In the second half, Tim is joined by Henry Grabar, author of Paved Paradise, to discuss the lessons we can glean from Chicago's deal with Wall Street, and why parking is such an emotive issue for so many.

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1812. A band of "Luddites" is laying siege to a textile mill in the North of England, under cover of night. They plan to destroy the machines that are replacing their jobs. But mill owner William Cartwright is prepared: he's fortified his factory with skilled marksmen, fearsome eighteen-inch metal spikes and barrels of sulphuric acid.

Today "Luddite" is a term of mockery ? a description for someone who's scared of technology. But in 1812, Luddism was no laughing matter for the likes of Cartwright. And he plans to teach the intruders a lesson.

For a full list of sources for this episode, please visit timharford.com.

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Cautionary Conversation: Andy Warhol?s assistant, Gerard Malanga, is facing a long prison sentence in Italy. He?s forged several Che Guevara portraits and tried to pass them off as genuine Warhols. What happens next is a landmark event in the history of art and authenticity?

Tim Harford is joined by Alice Sherwood, author of Authenticity, to discuss truth and fakery in modern times. Today, authenticity seems to matter more than ever ? and yet we?re also constantly assailed by people and products that are not what they seem. What?s going on here? And what?s the attention economy got to do with it?

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Heroic explorer Frederick Cook has just returned from the very roof of the world, the first man to reach the North Pole. Or so he says. Journalist Philip Gibbs has been watching him, and he?s convinced he?s lying.

When Gibbs publishes that belief, he stands alone. Cook has a gripping manner and an excellent reputation: his winning tale must be true. Diners boo Gibbs at a restaurant, newspapers publish sly-looking caricatures of him, and he even receives threats of violence.

But then, everything changes.

We often think of polarisation as a modern problem ? but the story of Cook and Gibbs has much to teach us here.

For a full list of sources for this episode, please visit timharford.com.

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Cautionary Conversation: Did a Nazi put America on the moon? To celebrate the launch of his mini-series on the V-2 rocket, Tim Harford sits down with Pushkin?s resident V-2 expert, Ryan Dilley. They discuss the so-called ?Father of Space Travel?, Wernher von Braun, and satirist Tom Lehrer?s musical lampooning of him.

A three-part mini series on the V-2 rocket is available now for Pushkin+ subscribers. We?ll be back again on August 4th with a brand new episode of Cautionary Tales on the main feed.

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Henry Petroski is one of Tim Harford's favourite fellow nerds. His study of engineering failures has profoundly influenced Tim's own writing, including the classic Cautionary Tales episode Death on the Dance Floor.

Petroski passed away in June 2023, at the age of 81. This week, in honour of the late great engineer, Tim looks back at the catastrophic Kansas City Hyatt Regency disaster of 1981. The hotel's space-age sky walks -- 60 tonnes of glass, concrete and steel -- crashed down onto the heads of revellers in the atrium below. 114 people died. What was to blame?

For a full list of sources for this episode, please visit timharford.com.

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Cautionary Conversation: An invasive parakeet species began spreading in New York City - and the government decided to kill every last bird. Tim Harford is joined by Ben Naddaff-Hafrey, host of The Last Archive, to talk about the great parakeet panic of the 1970s and a history of anxieties about population growth.

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?If you can make one heap of all your winnings and risk it on one turn of pitch-and-toss..."

Those words - from Rudyard Kipling's poem "If" - were based on charismatic nineteenth century doctor, Leander Starr Jameson. In Britain, Jameson was worshipped as a plucky hero: a bastion of courage and mental fortitude. Ironically, he was also responsible for the Jameson Raid, a South African coup that was an unmitigated disaster.

Kipling's champion might have spearheaded a fiasco - but could the poem "If" hold clues for triumph in another arena?

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Today, the idea of controlling the weather is controversial. Scientists who research geoengineering have even received death threats. But once upon a time, people were optimistic about remaking the climate in entire regions of the world. They approached this science with a touching faith in the power of human creativity.

Absent-minded genius Irving Langmuir was one such scientist. He dreamt of making deserts bloom and conjuring rain from an arid sky. He even believed that his experiments with a hurricane had succeeded in redirecting its path.

Why did we stop trying to control the weather? And might geoengineering help us solve climate change - or have we missed our chance?

For a full list of sources, please visit timharford.com.

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Today, we're sharing an episode of the gripping Pushkin series Lost Hills: The Dark Prince. The brand-new season takes a deep dive into the surf world to explore the legacy of Malibu's Dark Prince: Miki Dora. A surfer known for his style, grace and aggression, he ruled Malibu from the 1950s to the 1970s. Celebrated for his rebellious spirit, he was also a conman who led the FBI on a 7-year manhunt around the world.

Episodes 1 and 2 are out now: https://apple.co/losthills. And of course, if you'd like to binge all of the season 3 episodes early and ad free, make sure you subscribe to Pushkin+.

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CIA agents in Havana complaining of mental fog, dizziness and ear pain in 2016. Children in Miami in 1974, hyperventilating and wracked with abdominal pain. A medieval outbreak of the ?dancing plague?. A chorus of meowing nuns.

These mysterious and seemingly disparate events may have a simple explanation ? and one that?s often overlooked when it comes to understanding strange new syndromes.

For a full list of sources used in this episode visit Tim Harford.com.

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Why does economics get a bad rap? How did a small Hungarian airline wreak havoc in the 2000s?

What cautionary tales can we glean from Tim?s own life? And what?s his favourite role-playing game?

You sent in your questions and now - with the help of podcasting maestro Jacob Goldstein (What?s Your Problem?) - Tim is answering them.

Do you have a question for Tim? Please email any queries you might have, however big or small, to [email protected].

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You can gamble on horses or on the turn of a card - but Daniel Gould made a living betting on the outcome of the annual Eurovision Song Contest. Daniel made a profit because he studied the voting history of the competition, as well as the cultural and geo-political factors that predict which songs will triumph and which will score "nil point".    

In 2018, Daniel was so sure of his system of reducing the risk that he took out a loan on his home and bet it on Israel's song to win...  only to see the entry from Cyprus suddenly rocketing up the leader board. Was Daniel about to lose everything?

For a full list of sources used in this episode visit Tim Harford.com

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Anna Marie Jarvis wanted a national holiday to honor the dedication and sacrifice of America's mothers. She wasn't the first person to propose a Mother's Day - but her campaign caught the imagination of the people and the ears of the politicians.

Congress officially recognised Jarvis's Mother's Day in 1914 - but the indefatigable campaigner had allied herself with businessmen with vested interests in such an annual event. Mother's Day soon span out of its creator's control and caused an embittered Jarvis no end of heartache.      

For a full list of sources used in this episode visit Tim Harford.com

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It could cure any 'female ailment' - even cancer - said the adverts. But Lydia E. Pinkham?s Vegetable Compound was, in fact, just a concoction of herbs and alcohol of no proven medicinal merit. That didn't stop desperate American women from buying bottles of the stuff - and writing to Lydia Pinkham for medical advice.  

Why did her customers shun 'expert' doctors and opt instead for quack medicines? And why, when Lydia Pinkham finally came in for criticism, did no one question the efficacy of her vegetable compound?  

For a full list of sources for this episode, go to timharford.com.

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Cautionary Conversation: In 1990, a small extremist group launched a nerve gas attack on passengers riding the Tokyo subway. Thousands of people were hurt, more than a dozen died. At the time, such use of a chemical weapon seemed new and uniquely terrifying.

But advances in biology mean that today it's possible such a group could create a virus like Covid... with the potential to kill millions. What are the dangers and what can we do to combat them? Tim Harford talks to writer Michael Specter about his new book Higher Animals: Vaccines, Synthetic Biology and the Future of Life.

(Higher Animals: Vaccines, Synthetic Biology and the Future of Life is is available now at Pushkin.fm, Audible, or wherever audiobooks are sold.) 

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Air traffic controllers are meant to stop aircrafts from flying into one another... and if they fail, computer systems are installed to warn pilots of a coming collision. But sometimes these humans and computers give conflicting and confusing advice. Who to believe?

When a cargo plane and a Russian airliner collided in just such a situation, the authorities scrambled to work out how to prevent a repeat of the disaster... but a grieving father decided to seek revenge on those he held responsible. 

For a full list of sources for this episode, go to timharford.com.

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Cautionary Conversation: When a small-town detective gets a tip about a missing woman, he believes he's uncovered a highly-trained chameleon: a foreign spy. Soon, Esther Reed is on the Secret Service's Most Wanted list, and a nationwide manhunt has commenced. But all is not as it seems.

Jake Halpern joins Tim Harford to talk about the latest season of his Pushkin podcast Deep Cover: Never Seen Again. They discuss the dangers of incrementally increasing lies; how and why certain stories are escalated up the media "food chain"; and what it takes to lead a double life.

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In the early 90s, cutting-edge advertising agency Chiat/Day announced a radical plan, aimed at giving the company a jolt of creative renewal. They would sweep away corner offices and cubicles and replace them with zany open spaces, as well as innovative portable computers and phones. A brand new era of ?hot-desking? had arrived.

Problems quickly began. Disgruntled employees found themselves hauling temperamental, clunky laptops and armfuls of paperwork all over the office; some even had to use the trunks of their cars as filing cabinets. Soon, the unhappy nomads had had enough.

Bad execution was to blame for the failure of this ?playful? workspace. But Chiat/Day had made another mistake here, too ? one that was more serious, more fundamental and altogether more common.

For a full list of sources for this episode, go to timharford.com.

Listener questions

Tim is taking your questions. Do you have any queries about one of the stories we've covered? Are you curious about how we make the show? Send in your questions, however big or small, and Tim will do his best to answer them in a special Q&A episode.

You can email your question to [email protected] or leave a voice note at 914-984-7650. Please be aware that if you're calling from outside the US international rates will apply.

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With the 95th Academy Awards just around the corner, Tim Harford looks back at a basic lesson. Galileo tried to teach us that adding more and more layers to a system intended to avert disaster often makes catastrophe all the more likely. This principle has been ignored in nuclear power plants, financial markets and at the Oscars... all resulting in chaos.

For a full list of sources for this episode, go to timharford.com.

Listener questions

Tim is taking your questions. Do you have any queries about one of the stories we've covered? Are you curious about how we make the show?  Send in your questions, however big or small, and Tim will do his best to answer them in a special Q&A episode.

You can email your question to [email protected] or leave a voice note at 914-984-7650. That's a US number, so please be aware that if you're calling from outside the US international rates will apply.

See omnystudio.com/listener for privacy information.

Cautionary Conversation: Celebrated physicist Professor Paul Frampton was on his way to Brussels to meet the love of his life, swimwear model Denise Milani. Or so he thought. When he found himself in jail, he realized he?d fallen prey to a confidence trickster.

Tim Harford is joined by Maria Konnikova - journalist, psychologist and best-selling author - to talk about swindlers: what motivates them; what they look for in their victims; and how to avoid being conned altogether.

Listener questions

Tim is taking your questions. Do you have any queries about one of the stories we've covered? Are you curious about how we make the show?  Send in your questions, however big or small, and Tim will do his best to answer them in a special Q&A episode.

You can email your question to [email protected] or leave a voice note at 914-984-7650. That's a US number, so please be aware that if you're calling from outside the US international rates will apply.

See omnystudio.com/listener for privacy information.

Steve Jobs called It ?the most amazing piece of technology since the PC.? According to Jeff Bezos It was not only ?revolutionary,? but infinitely commercial. It was a fiendishly clever and massively hyped invention. But in the end It ? also known as the Segway ? was a failure.

What makes an invention useful and valuable? Jimi Heselden?s pragmatic brainchild the Concertainer might hold the answers. First used to shore up the collapsing walls of a canal, it ultimately solved problems that Jimi had never even imagined.

For a full list of sources for this episode, go to timharford.com

If you?d like to keep up with the most recent news from this and other Pushkin podcasts, be sure to sign up for our email list at pushkin.fm.

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A hundred years ago, the Tomb of the Pharaoh Tutankhamun was officially opened - despite the widely held belief that disturbing the remains of the Egyptian pharaohs could incur a deadly curse. Why did a team of archeologists risk inciting the wrath of King Tutankhamun by entering his burial chamber? And how many of them met a premature end for their impudence?

For a full list of sources for this episode, go to timharford.com

If you?d like to keep up with the most recent news from this and other Pushkin podcasts, be sure to sign up for our email list at pushkin.fm.

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Golden sparks are raining down on the Great Lafayette?s famous vaudeville show, ?The Lion?s Bride?. They look like they?re part of the performance. They aren?t ? and soon the theater is ablaze. The manager has to figure out how to save the 3000 audience members, now trapped in a burning building.

Thirty-five years earlier, the Brooklyn Theatre had gone up in flames too. The terrified spectators became a frantic, trampling mass, and hundreds perished in the flames and smoke. Panic in an emergency can kill. But keeping calm can also be lethal.

For a full list of sources for this episode, go to timharford.com

If you?d like to keep up with the most recent news from this and other Pushkin podcasts, be sure to sign up for our email list at pushkin.fm.

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Recorded before an audience at the Bristol Festival of Economics (11/17/2022)

The Dutch went so potty over tulip bulbs in the 1600s that many were ruined when the inflated prices they were paying for the plants collapsed - that's the oft-repeated story later promoted by best-selling Scottish writer Charles Mackay. It's actually a gross exaggeration. 

Mackay's writings about economic bubbles bursting entertained and informed his Victorian readers - and continue to influence us today - but how did Mackey fare when faced with a stock market mania right before his eyes? The railway-building boom of the 1840s showed he wasn't so insightful after all. 

For a full list of sources used in this episode visit Tim Harford.com

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As a special New Year treat we're presenting two Cautionary Tales Shorts - which have previously only been available to paying Apple and Pushkin+ subscribers. 

When a Plague Struck World of Warcraft: The makers of WoW wanted to spice up the fantasy computer game by introducing a virtual disease - "Corrupted Blood". It was supposed to be a fun challenge for expert player - but the illness became a pandemic which wiped out villages, cities and then whole realms.

AND

Blood on the Tracks: The signalmen running a busy stretch of railroad on the Scottish border had to adhere to strict rules to prevent crashes - but did those regulations fail to take into account human nature? Despite all the logbooks, alarm bells, levers and regulations, the signalmen didn't seem to notice a packed troop train barrelling towards them.

For a full list of sources go to timharford.com

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This week, we?re sharing an episode of Imaginary Worlds. For the last 30 years, the real world has been catching up to Neal Stephenson?s vision of the future in his 1992 novel Snow Crash, which influenced the creators of Google Earth, Second Life, Oculus Rift and more. Now the centerpiece of the novel, a virtual world called The Metaverse, may become a daily part of our lives thanks to Facebook (renamed Meta) and other big tech companies. In this episode of Imaginary Worlds, host Eric Molinsky explores whether it?s a good idea to use a satirical cyberpunk novel from decades ago as a blueprint for the future.You can hear more episodes of Imaginary Worlds at https://www.imaginaryworldspodcast.org

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More than 100,000 families - many of them amongst the poorest in Britain - put money aside for Christmas gifts and other seasonal treats in a savings club called Farepak. It wasn't a bank, and it wasn't great value for money... and it went bust. Kids went without toys, and festive dinner tables were left bare. 

Why would someone put their hard-earned money into such a scheme? And what does it tell us about how we often view Christmas as a time for frenzied spending? 

For a full list of sources used in this episode visit Tim Harford.com 

CAUTIONARY TALES RETURNS 6 JAN, 2023. HAPPY HOLIDAYS AND SEE YOU IN THE NEW YEAR. 

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There are eight American turkeys painted on the walls of Schleswig's Cathedral of St Peter - which is odd... since the frescoes were created two centuries before Columbus even crossed the Atlantic.   

How did the creatures come to be added to the medieval Biblical scene? Was this proof that the Germans reached the Americas before Columbus? Or do the painted birds tell a different story all together? 

For a full list of sources used in this episode visit Tim Harford.com 

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In a crisis most people respond with decency and solidarity. The bombing of British cities in the Second World War did not cause society to crumble as was expected, but proved instead human resilience. That defiant "Blitz Spirit" is still a source of pride for Britons... but have inconvenient facts about that time been ignored?

Alice Fiennes (co-host of the podcast Bad Women: The Blackout Ripper) explains that the chaos and disruption of the bombing allowed some people to commit awful crimes - and especially a trainee RAF pilot who embarked on a vicious killing spree under cover of darkness.   

Find Bad Women: The Blackout Ripper wherever you get your podcasts. 

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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 full list of sources used in this episode visit Tim Harford.com 

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Candy laced with cyanide and needles in marshmallows, we've long been warned to be suspicious of the sweet treats handed out by strangers at Halloween. But it seems that most stories of "Halloween sadism" are just that, stories. No child seems to have been  killed by adulterated Halloween candy... well... there is one terrible exception. The poisoned Pixy Stix of Pasadena, TX.

For a full list of sources used in this episode visit Tim Harford.com 

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Charlie Veitch was certain that 9/11 was an inside job. The attack on the World Trade Center wasn't the work of Al-Qaeda, but an elaborate conspiracy. He became a darling of so-called "9/11 truthers" - until he actually visited Ground Zero to meet architects, engineers and the relatives of the dead. The trip changed his mind... there was no conspiracy.  

His fellow "truthers" did not take Charlie's conversion well. 

David McRaney (host of You Are Not So Smart and author of How Minds Change: The Surprising Science of Belief, Opinion and Persuasion) joins Tim Harford to discuss what happened to Charlie Veitch; what it tells us about those who hold strong beliefs even in the face of damning contrary evidence; and why persuasion isn't always the right answer.  

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This week, it's an episode from Warfare, a podcast from our friends at History Hit. It's 1942. The year Anne Frank and her family went into hiding during the Second World War. It was there that Anne began keeping a diary that would become one of the most recognisable testimonies of the Jewish war-time experiences. But what do we know of her life before the war? Host James Rogers explores the Franks' lives before the outbreak of war, and why this story is still so relevant today.

You can find more from Warfare at https://podfollow.com/the-world-wars.

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Single and looking for love, Dr Robert Epstein found himself chatting with a slim, attractive brunette online. She seemed perfect... perhaps even too good to be true. 

Dr Epstein is an expert on artificial conversation - so surely he'd be the last person to fall for a computer? Chatbots fool us more often than we think... especially when they replicate our very worst conversational habits.  

To read more on this topic try Brian Christian?s ?The Most Human Human?. For a full list of sources go to timharford.com.  

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Inventor Franz Reichelt wants to test his novel "parachute suit" from as tall a structure as possible - and the Eiffel Tower seems ideal. Previous trial runs used a mannequin strapped to the chute and have not ended well. Despite this, his plan is to make the Eiffel Tower jump himself. Can he be persuaded to see sense?

Self-experimentation - particularly in the field of medicine - has a long and checkered history. Can we learn anything useful from such unorthodox experiments, or are they reckless acts of egotism and hubris? 

For a full list of sources go to timharford.com.  

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A meter is longer than a yard. An ounce is heavier than a gram. We harmlessly mix them up sometimes, but a "unit conversion error" when you're filling up the fuel tanks of an airliner can be fatal. Which is exactly what happened to Air Canada Flight 143. 

Tim Harford talks to mathematician and comedian Matt Parker about how the aircraft came to take off without the proper fuel load, how no one noticed until it was too late, and why such errors give us an insight into just how important maths is to keeping our complex world working as it should. 

For more "unit conversion errors"  check out Matt's book Humble Pi.

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Invented in the mid-1800s, bicycles have had enduring popularity. Across cultures, they have been embraced, promising freedom and mobility at a lower price point. 

Tim joins Dallas Campbell on Patented: History of Inventions, to discuss the history of the bicycle, from the invention story through to bicycle booms, the C5 Sinclair and the rise of dockless bike sharing schemes. 

If you're interested in the stories behind the world's greatest inventions - from the mighty steam train to the humble condom - subscribe to Patented: History of Inventions today.

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By the 1970s Howard Hughes was the "invisible billionaire?. A business tycoon, a daring aviator and Hollywood Lothario, Hughes had an amazing life story... but hiding away in luxury hotels he wasn't sharing his memories with anyone.

Then the recluse told a respected publishing house - via intermediaries - that he was working on an autobiography. The book would be a blockbuster... only it was all a lie.

For a full list of sources go to timharford.com

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Malcolm Gladwell joins Tim Harford to discuss our recent three-part tale about the race to reach the South Pole. There's talk of imperial decline; the power of the underdog; why getting everything you want is actually a handicap; and limes... lots and lots of limes.   

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