In certain parts of the world's northern latitudes, nature offers up its own laser light show: the aurora borealis, or Northern Lights.
The lights are created when a solar wind of charged particles enters the earth's magnetic field in the upper atmosphere. The resulting visual displays can be beautiful and dramatic, but they are often hard to track down in the northern night sky.
NPR's Susan Stone went on a hunt for the Northern Lights in Iceland. Her guide was storyteller and tour company operator Magnus Gudmundsson, who has spent more than 50 years watching the phenomenon occur in his native country.
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