This dimension sorts pioneers by the specific first or role they are remembered for, such as the first spacewalk or the first Moon landing. Wikipedia lists milestones including "the first spacewalk (by Alexei Leonov) on 18 March 1965" and "the first automatic landing on another celestial body in 1966." Browsing by role groups pioneers who achieved the same kind of first.
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1. Wikipedia: Robert H. Goddard
Wikimedia FoundationRobert H. Goddard, lead sectionQuote, Robert H. Goddard, lead section
Robert Hutchings Goddard was an American physicist, inventor, and engineer credited with creating and building the world's first liquid-fueled rocket, which was successfully launched on March 16, 1926.
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