Why do we explore?

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Across
  1. 4. a tool for looking into deep space
  2. 7. beautiful, but dangerous water
  3. 9. a tool for exploring the deep ocean
  4. 10. Yangtze, Nile and Amazon
  5. 12. white ones in summer
  6. 13. can shock you
Down
  1. 1. the perimeter of the land next to the ocean
  2. 2. this weather type is cold and can hurt you
  3. 3. thick mist
  4. 5. an extreme weather type
  5. 6. Colombia and Magellan are both..
  6. 8. don't bring an umbrella in this weather
  7. 11. a piece of land surrounded by water