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 was an advanced electro-mechanical cipher machine developed in Germany after World War 1. The Enigma machine was used by all branches of the German military as their main device for secure wireless communications until the end of World War 2.Several types of the Enigma machine were developed before and during World War 2, each more complex and harder to code break than its predecessors.The most complex Enigma type was used by the German Navy.everal types of the Enigma machine were developed before and during World War 2, each more complex and harder to code break than its predecessors. The most complex Enigma type was used by the German Navy.