The node pole: inside Facebook's Swedish hub near the Arctic Circle

Remote datacentre in Lulei cools itself using freezing outside air, has a fence to keep moose out and processes your selfies

From the outside, it looks like an enormous grey warehouse. Inside, there is a hint of the movie Bladerunner: long cavernous corridors, spinning computer servers with flashing blue lights and the hum of giant fans. There is also a long perimeter fence. Is its job to thwart corporate spies? No - it keeps out the moose.

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