The Red Planet

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Across
  1. 3. The red planets moon that starts with a letter P
  2. 4. 95% of the mars atmosphere is comprised of this
  3. 5. Humans inhale this to survive
  4. 6. the name of the roman god of war
Down
  1. 1. deespest valley in our solar system
  2. 2. The red planets moon that starts with the letter D