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I wonder if it’s still working?
Not in 1988.
https://en.wikipedia.org/wiki/Viking_program
Viking 2 lander shut-off date: April 11, 1980. Shut down after battery failure.
Viking 1 lander shut-off date: November 13, 1982. Shut down after human error during software update caused the lander’s antenna to go down, terminating power and communication.
