Unverified50% confidenceEventExact time
Reddit r/place 是 2017 年愚人节由 Reddit 发起的大规模社会实验，吸引超过 100 万用户参与
1
Sources
50%
Confidence
Long-term
Relevance
7/7/2026
First Seen
Sources
在3D地球仪上实时协作作画：Paint the Earth开源实验解析
hackernewshackernews7/6/2026
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