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Roger meets Alexander Graham Bell, around 1876, the year the telephone was patented. Roger is already planning to ring everyone who has ever written to us. Please use the form below instead.

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For questions and thoughts about a specific episode, the comments under the video are the best place. Other Ageonauts can chip in, and the conversation helps everyone. Use the form below for anything that doesn’t fit there.

Spotted a mistake? Tell us what you found and where, ideally with a source link. We check every correction against the evidence. Published videos can’t be re-edited, so where a clarification is warranted we’ll add an editorial note to that documentary’s page. Where historians genuinely disagree, we’ll say so rather than pretend there’s one answer.

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See you at the next stop in history.