Mariner 9, the first spacecraft to successfully go into orbit around Mars launched on May 30, 1971, and arrived November 13, 1971 for a duration of 167 days. This is the same pattern that has held up for more almost 50 years of Mars exploration: approximately 150-300 days.
Enigma was invented by the German engineer Arthur Scherbius at the end of World War I. Early models were used commercially from the early 1920s, and adopted by military and government services of several countries, most notably Nazi Germany before and during World War II.
The Enigma machine, first patented in 1919, was after various improvements adopted by the German Navy in 1926, the Army in 1928, and the Air Force in 1935.It was also used by the Abwehr, the Sicherheitsdienst, the railways, and other government departments.he Enigma machine, first patented in 1919, was after various improvements adopted by the German Navy in 1926, the Army in 1928, and the Air Force in 1935.