Cautionary Tales with Tim Harford
Cautionary Tales with Tim Harford

The Mummy's Curse (Halloween Classic)

This October, Cautionary Tales is going all out for Halloween. We've got four brand new spooky episodes coming your way throughout the month, plus a fifth over on the Cautionary Club on Patreon. If you have your own Halloween-themed Cautionary Tale or have any questions about belief and the par

Topics Discussed

Episode Summary

Executive Summary: The episode debunks the “curse of the pharaohs” surrounding Tutankhamun and the earlier “cursed mummy” story by showing how coincidence, selection bias, bad journalism, and human psychology created a lasting myth. It contrasts supernatural explanations with rational ones like infection, nocebo effects, and media amplification, ultimately arguing the curse is a cultural story rather than evidence-based fact.

Main Topics: The Tutankhamun “curse” and early deaths (Priority: 5/5): The transcript recounts sensational reports that Lord Carnarvon and others died after entering Tutankhamun’s tomb, framing them as signs of an ancient curse. Myth-making and newspaper exaggeration (Priority: 5/5): It shows how rival papers amplified rumors, invented details, and repeated hearsay, turning uncertain events into a compelling curse narrative. Placebo and nocebo effects (Priority: 4/5): The discussion uses Mesmerism and medical psychology to explain how belief can produce real bodily effects, including fear-driven symptoms. Selection bias and statistical reasoning (Priority: 5/5): The episode argues that people notice and remember the dramatic “hits” while ignoring the many non-events, creating the illusion of a curse. Rational explanations for deaths (Priority: 4/5): Possible causes such as infection, pneumonia, cancer, and ordinary mortality are presented as more plausible than toxins or magic. The older “unlucky mummy” story (Priority: 4/5): The coffin case allegedly on the Titanic is revealed as a separate, older legend that mutated over time and was never actually on the ship.

Key Arguments: The apparent curse around Tutankhamun is not supported by solid evidence; many linked deaths were ordinary, explainable, or too loosely connected to count. Media competition helped transform rumors into a durable legend by recycling dramatic but unverified details. Belief itself can create symptoms through the nocebo effect, which may explain some fear-related illness after the tomb’s opening. Selection bias makes curse stories persuasive because people remember the striking coincidences and ignore the vast number of non-cases. A serious comparison of exposed vs. unexposed people found little evidence that visiting the tomb shortened life expectancy. The earlier “mummy on the Titanic” tale is also a mutation of gossip and cannot be substantiated by the ship’s cargo manifest or museum records.

Data Points: Years since burial of Princess of Amun Ra: 3,500+ years - Time between ancient burial and later “cursed mummy” claims Years Howard Carter excavated with limited success: 15 years - Carter’s long search before finding Tutankhamun’s tomb Black jackals observed: 2 - Carter recorded seeing two black jackals, later woven into curse lore People in BMJ analysis: 44 Westerners - Mark Nelson’s study of people in Egypt during the dig Potentially exposed to the tomb: 25 - Subset of the 44 who visited the tomb Not exposed: 19 - Companion group in the BMJ analysis Average survival after visiting tomb: 20 years - Average lifespan after exposure in Nelson’s study Howard Carter’s survival after discovery: 17 years - He died in 1939 after the tomb discovery Nocebo dropout rate in trials: 5% - Participants in clinical trials who drop out due to perceived side effects from placebo treatment Age threshold for Target mailing example: Under 45 - Example used to illustrate possible broad targeting and selection bias

Pivotal Quotes: "Yes. Wonderful things. Wonderful things." — Howard Carter: Carter peering into Tutankhamun’s tomb for the first time "Death shall come on swift wings to whoever toucheth the tomb of the Pharaoh." — Unknown warning cited by newspapers: Reported warning that fueled the curse narrative around Tutankhamun "If these people can be persuaded to forbear their drugs in expectation of being cured by only the physician's finger or an iron rod pointing at them, they may possibly find good effects." — Benjamin Franklin: Franklin’s insight that belief can create real healing effects, anticipating the placebo effect

Implications: Listeners should treat supernatural or viral “mystery” claims skeptically, especially when supported by anecdotes and media repetition rather than data. The episode highlights how bias and belief shape belief itself.

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