the 1860s

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Every mention of the 1860s across the entire archive — with clickable timestamps to jump straight to the source.

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1 Mention

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NASA Chief: "We Just Built Antigravity Propulsion!”
@JesseMichels
1 mention
Like black body radiation in the 1860s with Gustav Kirchhoff.
[1:31:14 - 1:31:18] ▶