How JPL keeps the 13-year-old Curiosity rover doing science
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JPL engineers keep the 13-year-old Curiosity rover operating through creative software fixes and careful hardware management despite degrading components.
Curiosity has operated on Mars for 13 years, traveling 37 kilometers, drilling 42 rocks, and taking 763,000 photos. The rover uses a RAD 750 processor and faces continuous degradation in wheels, memory, and power. Engineers addressed a critical computer memory failure on Sol 2172 by repurposing 64 megabytes of flight software storage as a file system for Computer A, allowing it to function with less than 1 percent of its original memory. Wheel wear from sharp buried rock tips forced the team to drive the rover backwards to reduce damage. Alexandra Holloway, assistant team chief for engineering operations, noted that Curiosity's longevity results from ongoing effort, not just robust initial design. Perseverance, launched nine years after Curiosity, added an extra processor for autonomous visual odometry but shares similar core hardware.
What commenters are saying
Commenters focused on cost-effectiveness of robotic versus human exploration. The thread's dominant view holds that rovers deliver superior science per dollar spent, citing Curiosity's cost as roughly 3 billion dollars versus 90 billion for crewed lunar missions, making robotic exploration orders of magnitude cheaper. Several argued that mass-producing proven rover designs rather than building one-off experimental missions would multiply scientific output. A minority camp contended that human geologists on Mars would accomplish far more science per unit time but acknowledged the vast cost gap and engineering challenges (landing heavy payloads, cosmic radiation, return logistics) make human missions currently infeasible.
One commenter noted practical limits on rover mobility: Curiosity averages roughly 1 mile per year at 0.018 mph, and its drill operates at only 6 centimeters depth. Others highlighted that entry, descent, and landing systems consume most launch payload, making per-rover scientific capacity constrained by design conservatism.