2 Aug 2023, 17:17 UTC · By: Benny Kirk / Reducing transit time is vital for human missions to Mars to limit a crew's exposure to radiation," declared Kirk Shireman.
18 Dec 2022, 16:35 UTC · By: Benny Kirk / We don't blame you if you're shocked the United States wielded a nuclear spacecraft engine as far back as the 1960s. Or that hardly anyone remembers it.