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Questions for Discussion: Mars Dead or Alive: A Hostile Environment

What is the lure of Mars? Why are we so intent on getting there and studying its surface, given the huge costs in terms of time and money?
What makes the hard-working scientists so excited about this mission?
Designing a Mars rover is an enormous engineering challenge. What are at least 5 major problems the engineers needed to solve?
What tools does the Mars rover carry to collect evidence? How is the evidence transmitted to Earth?
Which planet would you like to travel to and explore? Explain your answer.