The Challenge of the Unknown
198421m480p
Episode 7 of educational math program "The Challenge of the Unknown" : "Argument - Am I Right?" featuring segments on boomerangs, petroglyphs & solar calendars, a spherical airship, and Stone Henge.
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The Challenge of the Unknown (1984) is hosted by the Internet Archive as a public-domain or openly licensed work, which means its copyright has expired, lapsed, or was released by the rights holder. No signup, no payment and no advertising interrupts playback. Nitrate streams the file directly from the Archive and hosts no video itself.
- Director
- J.C. Crimmins & Co. Inc.
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