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  1. How are the features on Mars similar to and different from features on Earth? (See answer)
  2. Study the two images of Mars showing nearly opposite sides of the planet. Describe the similarities and differences between the two images. (See answer)
  3. What two factors combined to make these observations of Mars so special? (See answer)
  4. What do you think life on Earth will be like in 2287, when another close meeting with Mars occurs?
    (See answer)