What are the origins of Santa Claus?

We're all familiar with the jolly, white-haired and bearded overweight man who sneaks down chimneys on Christmas Eve delivering presents to children. But where did this come from?

Image: Reindeer Island

The Copernicus Sentinel-2 mission takes us over part of Lake Winnipeg in the Canadian province of Manitoba, with Reindeer Island visible in the lower-right part of the image.

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