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The 47-year cycle of Mars was observed by the Ancients
The 47-year cycle of Mars: after 47 years - 22 synodic periods of 780 days each - Mars returns to the same position among the stars and is in the same relationship to the Earth and Sun. The ancient Mesopotamians discovered this cycle. 
Hello, It is commonly known that evidence of seasonal waterflow or active waterflow was found on Mars near the Curiosity, but the curiosity is not allowed to look. Please try to edit this in to the article. Thank you.
Much higher concentration of silica element at some sites over the past last seven months than anywhere else in the last 40 months after landing and silica makes nine tenths of composition of some of the rocks. The high silica was a surprise, the scientist said. And it supports microbal life.