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Fraser
2008-Oct-30, 12:30 PM
Cold weather and a dust storm are likely contributors to why NASA'S Phoenix Mars Lander went into a "safe mode" late Tuesday. The lander experienced a low-power fault in the electrical system. While engineers anticipated that a fault could occur due to the diminishing power supply, the lander also unexpectedly switched to the "B" [...]

More... (http://www.universetoday.com/2008/10/30/phoenix-enters-safe-mode/)