Multiple MatchingExercise 61 of 68

Designed to survive the harsh, dusty environment of our neighbouring planet, these robotic geologists have completely revolutionized our understanding of the solar system. Their primary mission was originally meant to last just ninety days, but their incredibly durable solar panels allowed them to continue operating…

• Which mission greatly surpassed its initially predicted operational lifespan?
• Which mission was deliberately placed in a location where human mechanics could not fix it?