---
title: "The Evolution — Four Zero-Dependency Physics Simulators"
description: "The Evolution by Shreyansh Kumar Singh: four zero-dependency physics simulators, one HTML file each — including AEON, built on published models."
url: https://www.shreyanshkumarsingh.com/projects/the-evolution-physics-simulators
author: Shreyansh Kumar Singh
updated: 2026-10-08
---

# The Evolution: four physics simulators, one HTML file each

By Shreyansh Kumar Singh. Open source. Runs offline.

**Why does blast damage radius scale with the cube root of yield?**

Blast radius scales with the cube root of yield because the energy of a blast fills a volume, and volume grows with the cube of distance — so a thousandfold bigger explosion reaches only about ten times further (Hopkinson–Cranz scaling). AEON, one of The Evolution's four simulators, is built on exactly that law, verified against published reference figures.

- **Simulators:** 4
- **Lines:** ≈5,000 total
- **Dependencies:** 0
- **AEON physics checks:** 85 against published figures
- **Smoke test:** 210 scenarios · 3,682 frames

## The problem it solves

Some things are too large, too fast, too slow or too violent for intuition to hold — the effects of a weapon, the life of a universe, evolution itself. The Evolution's premise: model them, animate them on a timeline, and let a non-expert feel the scale.

## What he built

### Four simulators, no dependencies

AEON (weapons consequences), COSMOS (the life and death of a universe), GENLIFE (organisms with genomes and neural brains, speciating under selection) and GENESIS (a particle-and-gravity sandbox). Each is one HTML file — no build step, no server, no network access — about 5,000 lines across the four.

### AEON: every zone from a published model

Air blast via Hopkinson–Cranz cube-root scaling from Glasstone & Dolan; thermal fluence with atmospheric attenuation; prompt radiation; a Lagrangian fallout plume after WSEG-10 with Way–Wigner t^-1.2 decay; cratering and seismic magnitude; Kinney & Graham for conventional explosives; Karzas & Latter for EMP; OTA casualty curves. Terrain shadows the blast; a logarithmic timeline runs from 0.1 ms to 48 hours.

## The hardest decision: Test the physics like code

A simulator that draws for effect is easy; one that is right is not. AEON ships with 85 physics checks against published reference values — the cube-root law to 1e-9, the 1 Mt 5 psi radius at 7.00 km, optimum burst height 178 m at 1 kt — plus a headless smoke test that runs the real renderer through 210 scenarios (3,682 frames, 84,262 draw calls) against a canvas mock that throws on anything a browser would reject.

Scope is a decision too: AEON models consequences only — no weapon design, construction or targeting information — and states that its casualty figures are upper-bound estimates with wide error bars.

## The result

Four simulators that open in any browser and run offline, with numbers that trace to sources. AEON's yield slider spans seven orders of magnitude, and the cube-root law is why one exponent can cover them all.

## Research findings

- **Cube-root scaling as the spine of a consequence model:** A thousandfold increase in yield multiplies the damage radius by ten, not a thousand — one exponent covers seven orders of magnitude.
- **Lagrangian parcels instead of an ellipse:** Fallout dose becomes a function of position and time-since-detonation — activity falls ~100× in the first two days (Way–Wigner t^-1.2).

Stack: Vanilla JS, Canvas 2D, Zero deps

- [Source on GitHub](https://github.com/Shreyanskumarsingh20/THE_EVOLUTION)
- [Run AEON in the browser](https://www.shreyanshkumarsingh.com/sims/aeon.html)

---

Shreyansh Kumar Singh — AI & Full-Stack Engineer, Pune, India. Contact: shreyanshkumarsingh208@gmail.com or https://www.shreyanshkumarsingh.com/contact (call and WhatsApp buttons). More: https://www.shreyanshkumarsingh.com/llms.txt · https://www.shreyanshkumarsingh.com/sitemap.xml