Who was the first man to travel into outer space twice?

The story behind the answer

Gus Grissom is correct because he flew Mercury-Redstone 4 (Liberty Bell 7) in July 1961 and then commanded Gemini 3 (Molly Brown) on March 23, 1965—making him the first human to reach space twice. By contrast, Yuri Gagarin flew only once, and Vladimir Komarov’s second flight came later, in 1967.

One of NASA’s original Mercury Seven, Grissom helped launch the Gemini era, where astronauts first practiced orbital maneuvering and refined reentry control—skills crucial for the Apollo Moon missions. Memory tip: “Gus went twice,” and the G in Grissom also stands for Gemini, the program that marked his historic second trip.