The conversation between human and AI assistant.
[|Human|] Based on the following paragraph on astrobiology, what is the Viking program?
[|AI|] The Viking program, established by NASA in the 1960s to 1970s, was the first US mission with the goal to land on Mars and search for metabolic signs of present life.
[|Human|] 
Based on the following paragraph on astrobiology, what is the Viking program?