Mars in fiction from red-colored vegetation, and Schiaparelli observed what he took to be linear features on the face of Mars, which he thought might be water channels. Because the Italian for channels is "canali", English translations tended to render the word as "canals", implying artificial construction. Lowell's books on Mars expanded on this notion of Martian canals, and a standard model of Mars as a drying, cooling, dying world was established. It was frequently speculated that ancient Martian civilizations had constructed irrigation works that spanned the planet in an attempt at saving their dying world. This concept spawned a large number of
Human mission to Mars space exploration proposal in the 1960s to send a crewed flight to Mars and Venus (TMK-MAVR design) without landing. The TMK spacecraft was due to launch in 1971 and make a three-year-long flight including a Mars fly-by at which time probes would have been dropped. The project was never completed because the required N1 rocket never flew successfully. The "Mars Expeditionary Complex", or "'MEK"' (1969) was another Soviet proposal for a Mars expedition that would take a crew from three to six to Mars and back with a total mission duration of 630 days. Following the Viking missions to Mars,