Most electronics suffer a debilitating aquaphobia. At the ­littlest­ spillage—heaven forbid Dorothy’s bucket—of water, our wicked widgets shriek and melt. Microsoft, it would seem, missed the memo. Last June, the company installed a smallish data center on a patch of seabed just off the coast of Scotland’s Orkney Islands; around it, approximately 933,333 bucketfuls of brine circulate every hour.

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