late 40s

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Every mention of late 40s across the entire archive — with clickable timestamps to jump straight to the source.

1 Video
1 Mention

1 video containing this reference

NASA Chief: "We Just Built Antigravity Propulsion!”
@JesseMichels
1 mention
which is, you know, was the most in-use observatory in the late 40s and early 50s.
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