For well-distributed points, nearest neighbor search is often near O(logn)O(\log n)O(logn) in practice. In the worst case (all points clustered tightly or along a line), it can degrade to O(n)O(n)O(n), but this is uncommon with typical spatial data.
But some users remain concerned about the platform's approach.
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NASA astronaut Mike Fincke has logged 549 days in space, with nine spacewalks totaling 48 hours and 37 minutes.