The last communication from the Mars Rover Spirit was on March 22, 2010. A few moments ago NASA announced that there would be no more attempts to contact the space robot after a transmission that will end on May 25th.
It is suspected that Spirit’s internal circuitry was damaged by very low temperatures experienced during the Martian winter. While it was hoped that solar panels would allow heaters to bring the robot back to life, this apparently has not happened. The resources that would be needed to continue what seems to be a fruitless attempt at communication are now needed elsewhere. According to NASA,
Engineers’ assessments in recent months have shown a very low probability for recovering communications with Spirit. Communications assets that have been used by the Spirit mission in the past, including NASA’s Deep Space Network of antennas on Earth, plus two NASA Mars orbiters that can relay communications, now are needed to prepare for NASA’s Mars Science Laboratory mission. MSL is scheduled to launch later this year.