| 31. | He also studied the aurora borealis, the effects of lightning, and the cause of hail.
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| 32. | As it turns out, Cruz has not rivaled the aurora borealis in the Canadian sky.
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| 33. | Of these some are on the aurora borealis, which he studied closely for many years.
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| 34. | The light, she later learned, was the aurora borealis.
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| 35. | The program included the four movements Northern Quest, Arctic Blizzard, Aurora Borealis and Perpetual Twilight.
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| 36. | A phenomenon also attracting numerous tourists is the Aurora Borealis or " Northern Lights ".
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| 37. | He named it aurora borealis because the fish's appearance reminded him of the Northern Lights.
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| 38. | In the Northern Hemisphere, the multicolored veil is called the aurora borealis, or northern lights.
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| 39. | On Earth, the solar wind is well known to produce the aurora borealis, or northern lights.
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| 40. | For example, he regarded the valkyries as heavenly lights such as meteors and the Aurora Borealis.
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