# pY science pack (technology) internal name `py-science-pack-4` · tier 7 (Production science pack, [tier 7](https://factorio.kalzumeus.com/tier/7.md)) HTML page: https://factorio.kalzumeus.com/tech/py-science-pack-4/ ## Cost 3000 units of (1 × [Production science pack](https://factorio.kalzumeus.com/item/production-science-pack.md), 2 × [pY science pack 3](https://factorio.kalzumeus.com/item/py-science-pack-3.md), 3 × [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md), 6 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 10 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 20 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 30 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md), 6 × [Military science pack](https://factorio.kalzumeus.com/item/military-science-pack.md)), 300 s each. ## Requires (7) - [Anabolic RNA](https://factorio.kalzumeus.com/tech/anabolic-rna.md) - [Antitumor agents](https://factorio.kalzumeus.com/tech/antitumor.md) - [Bone morphogenetic proteins](https://factorio.kalzumeus.com/tech/bmp.md) - [Nanochondria](https://factorio.kalzumeus.com/tech/nanochondria.md) - [Orexigenic compounds](https://factorio.kalzumeus.com/tech/orexigenic.md) - [Reontogenesis](https://factorio.kalzumeus.com/tech/reca.md) - [Erythropoietin stimulating agents](https://factorio.kalzumeus.com/tech/recombinant-ery.md) ## Leads to (41) - [Arthurians - Stage 3](https://factorio.kalzumeus.com/tech/arthurian-mk03.md) - [Biofluid network - Stage 3](https://factorio.kalzumeus.com/tech/biofluid-mk03.md) - [Cadaveric arums - Stage 4](https://factorio.kalzumeus.com/tech/cadaveric-arum-mk04.md) - [Cottongut - Stage 4](https://factorio.kalzumeus.com/tech/cottongut-mk04.md) - [Cridrens - Stage 3](https://factorio.kalzumeus.com/tech/cridren-mk03.md) - [Dhilmos - Stage 3](https://factorio.kalzumeus.com/tech/dhilmos-mk03.md) - [Dingrits - Stage 3](https://factorio.kalzumeus.com/tech/dingrits-mk03.md) - [Fawogae - Stage 4](https://factorio.kalzumeus.com/tech/fawogae-mk04.md) - [Grod - Stage 4](https://factorio.kalzumeus.com/tech/grod-mk04.md) - [Guar - Stage 4](https://factorio.kalzumeus.com/tech/guar-mk04.md) - [Kicalk - Stage 4](https://factorio.kalzumeus.com/tech/kicalk-mk04.md) - [Kmauts - Stage 3](https://factorio.kalzumeus.com/tech/kmauts-mk03.md) - [Korlex - Stage 4](https://factorio.kalzumeus.com/tech/korlex-mk04.md) - [Laika 2.0](https://factorio.kalzumeus.com/tech/laika.md) - [Military](https://factorio.kalzumeus.com/tech/military-4.md) - [Mining productivity](https://factorio.kalzumeus.com/tech/mining-productivity-9.md) - [Molecular decohesion - Stage 4](https://factorio.kalzumeus.com/tech/molecular-decohesion-mk04.md) - [Moondrop - Stage 5](https://factorio.kalzumeus.com/tech/moondrop-mk05.md) - [Mukmoux - Stage 4](https://factorio.kalzumeus.com/tech/mukmoux-mk04.md) - [Non Renewables - Stage 4](https://factorio.kalzumeus.com/tech/nonrenewable-mk04.md) - [Numal - Stage 3](https://factorio.kalzumeus.com/tech/numal-mk03.md) - [Organ printing - Stage 3](https://factorio.kalzumeus.com/tech/organ-printing-mk03.md) - [Phadais - Stage 3](https://factorio.kalzumeus.com/tech/phadai-mk03.md) - [Trains & railway - Stage 4](https://factorio.kalzumeus.com/tech/railway-mk04.md) - [Rennea - Stage 4](https://factorio.kalzumeus.com/tech/rennea-mk04.md) - [Scrondrixes - Stage 3](https://factorio.kalzumeus.com/tech/scrondrix-mk03.md) - [Seaweed - Stage 5](https://factorio.kalzumeus.com/tech/seaweed-mk05.md) - [Simik - Stage 3](https://factorio.kalzumeus.com/tech/simik-mk03.md) - [Solar Power - Stage 3](https://factorio.kalzumeus.com/tech/solar-power-mk03.md) - [Trits - Stage 4](https://factorio.kalzumeus.com/tech/trits-mk04.md) - [T.U.R.D. reselect](https://factorio.kalzumeus.com/tech/turd-partial-respec-4.md) - [Tuuphras - Stage 4](https://factorio.kalzumeus.com/tech/tuuphra-mk04.md) - [Ulrics - Stage 4](https://factorio.kalzumeus.com/tech/ulric-mk04.md) - [Vonixes - Stage 2](https://factorio.kalzumeus.com/tech/vonix-mk02.md) - [Vrauks - Stage 5](https://factorio.kalzumeus.com/tech/vrauks-mk05.md) - [Worker robot speed](https://factorio.kalzumeus.com/tech/worker-robots-speed-5.md) - [Xenos - Stage 3](https://factorio.kalzumeus.com/tech/xeno-mk03.md) - [Yaedols - Stage 4](https://factorio.kalzumeus.com/tech/yaedols-mk04.md) - [Yotoi aloe - Stage 4](https://factorio.kalzumeus.com/tech/yotoi-mk04.md) - [Zipirs - Stage 4](https://factorio.kalzumeus.com/tech/zipir-mk04.md) - [Zungror - Stage 3](https://factorio.kalzumeus.com/tech/zungror-mk03.md) ## Unlocks (2 recipes) ### Perfect samples (`perfect-samples`) - 50 s · tier 7 - Ingredients: 1 × [Intestinal electrical epithelium](https://factorio.kalzumeus.com/item/intestinal-ee.md), 1 × [Cognition osteochain](https://factorio.kalzumeus.com/item/cognition-osteochain.md), 1 × [Adaptable automucosa](https://factorio.kalzumeus.com/item/adaptable-automucosa.md), 1 × [Polynuclear ganglion](https://factorio.kalzumeus.com/item/polynuclear-ganglion.md), 1 × [Geostabilization tissue](https://factorio.kalzumeus.com/item/geostabilization-tissue.md), 1 × [Limno circulation cluster](https://factorio.kalzumeus.com/item/lcc.md), 1 × [Kmaut tendons](https://factorio.kalzumeus.com/item/tendon.md), 1 × [Cryogland](https://factorio.kalzumeus.com/item/cryogland.md), 1 × [Subdermal chemosnare](https://factorio.kalzumeus.com/item/subdermal-chemosnare.md), 1 × [Sternite perspiration lung](https://factorio.kalzumeus.com/item/sternite-lung.md), 1 × [Dingrit spike](https://factorio.kalzumeus.com/item/dingrit-spike.md), 1 × [Magnetic organ](https://factorio.kalzumeus.com/item/magnetic-organ.md), 1 × [Glandular myocluster](https://factorio.kalzumeus.com/item/glandular-myocluster.md), 1 × [Hormonal thoughtorg](https://factorio.kalzumeus.com/item/hormonal.md), 1 × [Venom gland](https://factorio.kalzumeus.com/item/venom-gland.md), 50 × [Autoantigens](https://factorio.kalzumeus.com/fluid/autoantigens.md), 1 × [Dimensional gastricorg](https://factorio.kalzumeus.com/item/dimensional-gastricorg.md), 1 × [Variable spinneret kiloglider](https://factorio.kalzumeus.com/item/vsk.md), 1 × [Aeroorgan](https://factorio.kalzumeus.com/item/aeroorgan.md) - Results: 10 × [Perfect samples](https://factorio.kalzumeus.com/item/perfect-samples.md) - Made in: Research center MK 01, Research center MK 02, Research center MK 03, Research center MK 04 - Unlocked by: [pY science pack](https://factorio.kalzumeus.com/tech/py-science-pack-4.md) ### pY science pack 4 (`py-science-pack-4`) - 15 s · tier 7 · productivity modules allowed - Ingredients: 20 × [Moss](https://factorio.kalzumeus.com/item/moss.md), 1 × [Perfect samples](https://factorio.kalzumeus.com/item/perfect-samples.md), 1 × [Non conductive phazogen](https://factorio.kalzumeus.com/item/nonconductive-phazogen.md), 2 × [Negasium](https://factorio.kalzumeus.com/item/negasium.md), 1 × [Zinc finger fusion proteins](https://factorio.kalzumeus.com/item/zinc-finger-proteins.md), 10 × [Vonix eggs](https://factorio.kalzumeus.com/item/vonix-eggs.md), 50 × [Flavonoids](https://factorio.kalzumeus.com/fluid/flavonoids.md), 10 × [Biopolymer](https://factorio.kalzumeus.com/item/biopolymer.md), 1 × [Glassware](https://factorio.kalzumeus.com/item/flask.md), 10 × [Super alloy](https://factorio.kalzumeus.com/item/super-alloy.md), 1 × [Nanozymes](https://factorio.kalzumeus.com/item/nanozymes.md), 1 × [Mechanical Parts 03](https://factorio.kalzumeus.com/item/mechanical-parts-03.md) - Results: 3 × [pY science pack 4](https://factorio.kalzumeus.com/item/py-science-pack-4.md) - Made in: Research center MK 01, Research center MK 02, Research center MK 03, Research center MK 04 - Unlocked by: [pY science pack](https://factorio.kalzumeus.com/tech/py-science-pack-4.md)