New best story on Hacker News: What are those grids of glass in the sidewalk and why are they purple? - Teckmantra

New best story on Hacker News: What are those grids of glass in the sidewalk and why are they purple?

Anish January 03, 2020

Labels: Hacker News

What are those grids of glass in the sidewalk and why are they purple?
511 by vo2maxer | 80 comments on Hacker News.

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