In December, reindeer appear everywhere in the United States: on holiday cards, store windows and TV ads, becoming part of the season’s joy. In northern Finland, above the Arctic Circle, the same ...

High in Norway’s mountains, a lone hiker recently walked across a patch of retreating ice and stumbled onto a scatter of wooden stakes, stone fragments, and ancient debris that had not seen daylight ...

“These are Santa’s reindeer. But we are really lucky because Santa needs them only one day of the year. So we can fly them 364.” It’s a well-rehearsed line. Juha Kujala has uttered it many times over ...