| 21. | The library houses the Alaska and Polar Regions Collections & Archives special collection.
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| 22. | Flying in a polar region during full sunlight allows more negligible altitude variations.
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| 23. | Phoenix landed on the north polar region of Mars on May 25, 2008.
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| 24. | The Polar Regions are among the main geographical focuses of Bell s research.
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| 25. | He also visited the northern and southern polar regions and the Bering Strait.
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| 26. | Ice caps come and go from the polar regions as the seasons change.
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| 27. | The polar regions have a way in which they amplify change.
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| 28. | Versions of this game have been found in polar regions to the Equatorial zones.
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| 29. | They are relatively uncommon and are mostly seen in the polar regions of Earth.
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| 30. | The organisms in the polar region can not survive the climate at the equator.
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