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** Launched 10 November 1968
** Circumlunar 14 November 1968
** Returned to Earth 17 November 1968
** The second circumlunar spaceflight to include lifeforms from Earth, Zond 6 carried a biological payload of turtles, flies, and bacteria. It also carried scientific probes including cosmic ray, micrometeoroid detectors, and photographic equipment.
* Zond 1969A
** Launched 20 January 1969
** Stage

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