How this section works

When someone on Reddit, Discord, or via the Request-a-Sim form asks for a topic SciSim doesn't cover yet, we build it — and credit the requester at the top of the simulation. Every sim here was created in response to a real ask. Want to see your idea up here? Submit a request →

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Carbon Cycle
Four reservoirs (atmosphere, biosphere, oceans, fossil reserves) exchanging carbon in real time. Burn fossil fuels, plant a forest, watch the bathtub fill or drain.
Requested by u/tenderhartReddit
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Water Cycle
Sun evaporates the ocean, wind moves vapour inland, mountains squeeze out rain, rivers carry runoff back to sea. Crank the temperature: feel the conveyor belt speed up.
Requested by u/tenderhartReddit
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Greenhouse Effect
Sunlight in, IR out, greenhouse molecules trap the difference. Watch CO₂, CH₄, H₂O each grab a chunk of outgoing heat. Doubled CO₂ → +3 °C. Math meets vision.
Requested by u/tenderhartReddit
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Nitrogen Cycle
N₂ is locked behind a triple bond. Lightning, root-nodule bacteria, and Haber-Bosch are the only three keys. Humans have doubled the cycle — dead zones, N₂O, biodiversity loss.
Requested by u/No-One495Reddit

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