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National Geographic The sky over Yellowknife, Northwest Territories, Canada, churns with light from an aurora borealis (photograph by Paul Nicklen).

The 25 Best Places to Photograph on Planet Earth

Natural Phenomena: Aurora Borealis Photo credit: Feichtnerc Tromsø, Norway - visible on cloudless nights from late November to early April from several arctic locations and even many places much farther south

Experts said geomagnetic storms are more disruptive now than in the past because of our greater dependence on technical systems that can be affected by electric currents. This shot was taken in Norway