The ends of the Earth

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Across
  1. 3. there are roughly 5 million Penguins in the Antarctic but this regal breed of Penguin is the tallest and heaviest by far
  2. 6. Antarctica has some of the cleanest air and skies in the world. This certainly makes it a lot easier to study this cosmic subject.
  3. 7. Name given to the Indigenous people of the Arctic.
  4. 8. The only American state that is considered a part of the Arctic Circle
Down
  1. 1. Often referred to as the 'Unicorn of the Sea' this marine species is only found in the Arctic
  2. 2. this heavy rock band earned a Guinness World Record for being the only band to have played on all 7 continents when they held a concert on Antarctica in 2013
  3. 4. Antarctica is home to this Southern-most volcano known as Mount....
  4. 5. The Artic consists of parts of parts of Canada, Russia, the USA, Greenland, Finland, Sweden, Iceland and which other country?