page_title: December 1959
hierarchical_section_title: December 1959
caption_attribution_description: English: The test subject, a rhesus monkey named Sam, is seen encased in a model of the Mercury fiberglass contour couch. He will be flown on the Little Joe 2 as a test subject.
context_page_description: The following events occurred in December 1959:
context_section_description: The following events occurred in December 1959:
caption: December 4, 1959: U.S. rhesus monkey Sam launched into mesosphere
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