# Brazil's Strangest Unsolved Mystery.. The Men Who Died Wearing Lead Masks in Vintém Hill Page: https://stenobird.com/podcast/you-can-t-unhear-7840944/brazil-s-strangest-unsolved-mystery-the-men-who-died-wearing-lead-masks-in-vint-m-hill Text version: https://stenobird.com/podcast/you-can-t-unhear-7840944/brazil-s-strangest-unsolved-mystery-the-men-who-died-wearing-lead-masks-in-vint-m-hill.md Podcast: [You Can't Unhear](https://stenobird.com/podcast/you-can-t-unhear-7840944) Published: 2026-07-19T23:00:29+00:00 Episode link: https://podcast.show/3957915/ Audio file: https://audio4.redcircle.com/episodes/c6e5f075-fbe8-42aa-9559-e2aac042981a/stream.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/you-can-t-unhear-7840944/episodes/brazil-s-strangest-unsolved-mystery-the-men-who-died-wearing-lead-masks-in-vint-m-hill Duration seconds: 474 ## Resource In August 1966, two electronics technicians were found dead on a hill overlooking Rio de Janeiro, Brazil. They were dressed in formal suits, wearing homemade lead eye masks, and lying side by side without signs of violence. Beside them was a mysterious handwritten note containing precise instructions, including one chilling line: "Swallow the capsule... protect with metal... wait for a signal." More than half a century later, no one knows exactly what happened. In this episode of You Can't Unhear , we investigate one of Brazil's most baffling unsolved mysteries. From secret experiments and spiritual beliefs to UFO sightings and failed criminal theories, every explanation leaves behind new questions. Were the two men victims of an elaborate scam, a dangerous experiment, or something they believed was beyond this world? ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/you-can-t-unhear-7840944/episodes/brazil-s-strangest-unsolved-mystery-the-men-who-died-wearing-lead-masks-in-vint-m-hill/transcription-requests` — Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/you-can-t-unhear-7840944/brazil-s-strangest-unsolved-mystery-the-men-who-died-wearing-lead-masks-in-vint-m-hill.md` — Read the agent-friendly Markdown representation of this episode resource. A page view does not enqueue transcription. Agents should invoke `request_transcript` explicitly when they need this episode processed. ## Transcript Full transcripts are not published on public pages unless there is a clear rights basis.