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They were initially built by WE, then manually filled in over time. It's taken quite a while and you can still find some with holes. Relevant comment: https://
by rocky1138 12y ago
They were initially built by WE, then manually filled in over time. It's taken quite a while and you can still find some with holes.
Relevant comment: https://news.ycombinator.com/item?id=8649733 https://news.ycombinator.com/item?id=8649733