Here's my first attempt at producing purple science in a city block, no modules or beacons. Produces 4 purple science per second, which is probably insignificant to most, but I'm proud of
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Factorio Prints: Compact Purple Science 0.17
One of my favorite builds: 4k of purple science per minute : factorio | Science, Friday facts, Purple
Factorio 0.17 Ep 33: PURPLE PRODUCTION SCIENCE - Entry Level to Megabase 2 - Tutorial Let's Play - YouTube