⭐ Featured Simulations

3D Cellular Automaton — Survival/Birth RulesNewMathematicsExplore 3D cellular automata with Moore neighborhood (26 neighbors). Famous rules: Cloud,… 3D Reaction-Diffusion PatternsNewChemistry & MaterialsGray-Scott reaction-diffusion model in a 3D voxel grid rendered with Three.js. Two… Antenna Radiation — Dipole Field PatternsNewElectromagnetismAn oscillating dipole radiates electromagnetic waves in a doughnut-shaped pattern, with no… Birefringence — Double Refraction in CrystalsNewOptics & LightAnisotropic crystals split a light ray into ordinary and extraordinary rays travelling at… DBSCAN — Density-Based ClusteringNewMachine Learning & Neural NetworksDBSCAN grows clusters from dense core points via ε-neighbourhoods and minPts, labelling… Bernoulli PrincipleNewFluid Dynamics & AerodynamicsInteractive Venturi tube: watch fluid speed up through a constriction as pressure drops.… Bacteria CompetitionNewBiologySimulate competing bacterial colonies vying for nutrients on a petri dish using growth and… Earthquake FaultNewGeology & Earth ScienceSet loading rate, friction and fault area on a stick-slip fault, then watch stress build and… 2D Collisions — Momentum and EnergyNewPhysics & Mechanics2D elastic and inelastic ball collisions with conservation of momentum and energy. Adjust… Poker Hand Odds — Texas HoldemNewBoard Games & Game MathematicsCalculate pot odds, outs and equity for Texas Holdem hands. See how probability evolves from… Blockchain ConsensusNewCryptographyProof-of-Work mining and longest-chain consensus: miners race to beat the difficulty target,… CentrifugeNewEngineering & MaterialsSedimentation under centrifugal force: RCF=ω²r/g and Stokes velocity v=d²(ρ_p−ρ_f)ω²r/(18η)… Coastal ErosionNewGeology & Earth ScienceWaves approaching at an angle drive longshore drift, eroding headlands and building beaches… Coral BleachingNewEcology & Conservation BiologyThermal stress builds as Degree Heating Weeks pass the bleaching threshold — trigger a… Dice & ProbabilityNewBoard Games & Game MathematicsRoll n dice and watch the sum distribution approach a Gaussian (central limit theorem).… 0/1 KnapsackNewAlgorithms & AIMaximize value without exceeding capacity. Watch dynamic programming fill the dp table cell… 3D Spherical PendulumNewPhysics & MechanicsA bob constrained to a sphere swings, traces rosette orbits, locks into perfect cones — and,… A* PathfindingNewAlgorithms & AIWatch A* find the shortest path on a grid using f = g + h. Paint walls, drag start/goal,… BackpropagationNewMachine Learning & Neural Networksδ pulses flow backward through a small MLP: gradients highlight edges, weights update, and… Bell's InequalityNewQuantum PhysicsWatch entangled spins violate the CHSH inequality: classical hidden variables cap out at… EutrophicationNewNature & ClimateSlowly raise phosphorus loading and a clear lake tips into algal blooms, anoxia and fish… Acid-Base EquilibriumNewChemistry & MaterialsPerform a virtual acid-base titration: add drops of strong base to a weak acid and watch the… Debye ScreeningNewElectromagnetismElectrons swarm into a screening cloud around a central ion — tune temperature and density… Ant ColonyNewBiologyTune pheromone weight, evaporation and deposit strength to watch ants converge on the… Gravitational Wave Chirp — LIGO Inspiral Waveform InteractiveSpecial RelativitySet binary masses and distance, watch h(t) strain waveform sweep and chirp, spectrogram,… Hodgkin-Huxley NeuronNeuroscience & BiophysicsConductance-based neuron model (Nobel 1963). Inject current and watch Na⁺/K⁺ gating… BB84 Quantum Key DistributionQuantum PhysicsStep through the BB84 protocol: Alice sends qubits in random bases, Bob measures, and they… Heisenberg Uncertainty PrincipleQuantum PhysicsLive demonstration of Δx·Δp ≥ ℏ/2 using a Gaussian wave packet displayed simultaneously in… Quantum Circuit SimulatorQuantum PhysicsClick-to-place quantum circuit builder for up to 3 qubits. Supports H, X, Y, Z, S, T, CNOT,… Lorentz Contraction — Length Contraction in Special RelativitySpecial RelativityAccelerate a rod toward light speed and measure how the gamma factor squeezes its length… Schrödinger EquationQuantum Physics1D time-dependent Schrödinger equation solved via split-operator method. Gaussian wave… Food Web SimulatorEcology & Conservation BiologyRewire a food web of plants, herbivores and predators, then watch Lotka-Volterra dynamics… Anosov Map — Arnold Cat Map & Hyperbolic ChaosChaos & DynamicsVisualize the Arnold cat map (Anosov diffeomorphism) on the torus. Watch any image mix into… Aurora Borealis — Charged Particles in Earth's MagnetosphereSpace & AstronomyFire solar wind particles at Earth's magnetosphere and follow the Lorentz force spiralling… Big Bang Nucleosynthesis — First 20 MinutesCosmologyFollow the first 20 minutes after the Big Bang: track the neutron-to-proton ratio and see… CMB — Cosmic Microwave Background Power SpectrumCosmologyTurn the dials on baryon density, dark matter and the Hubble constant and watch the acoustic… Brainwave Oscillations — EEG SimulatorNeuroscience & BiophysicsKuramoto coupled-oscillator EEG: alpha, beta, theta and delta bands (0.5–30 Hz). Adjust… Bridge Structural AnalysisEngineering & Materials2D truss bridge simulation using the direct stiffness method. Assemble the global stiffness… Caesar & Vigenère CiphersCryptographyEncrypt and decrypt messages with classical substitution ciphers. Frequency analysis attack… Bifurcation DiagramChaos & DynamicsBifurcation diagram of the logistic map r·x·(1−x). Reveals period-doubling cascade and onset… Epidemic DynamicsSociety & EconomicsParticle-based SEIR epidemic model. Adjust transmission rate β, recovery rate γ, vaccination… Fractal ExplorerMathematicsMandelbrot and Julia sets rendered with smooth-colouring GLSL shaders. Pan, zoom, switch… Butterflies & FlowersNature & ClimateWatch colourful butterflies flutter between flowers using steering behaviour — click to… Pathfinding — A*, Dijkstra, BFSAlgorithms & AIDraw walls, generate mazes and watch A*, Dijkstra, Greedy Best-First and BFS explore the… Binary StarsSpace & AstronomyTwo stars orbiting their common centre of mass with Velocity Verlet integration. Visualises… 3D Boids — FlockingAlgorithms & AI500 agents in 3D space following Reynolds' rules: separation, alignment, cohesion. Emergent… Ocean WavesNature & ClimateProcedural ocean via GLSL shaders (Gerstner waves). Adjust wind speed and storm intensity in… N-Body GravitySpace & AstronomyGravitational interaction of hundreds of bodies via Leapfrog integrator. Galaxy disk… Spiral GalaxySpace & Astronomy80,000 stars forming a spiral galaxy with arms, nebulae and a central bulge using instancing. Lorenz AttractorChaos & DynamicsUp to 80 trajectories forming "butterfly wings" in 3D. Adjust σ, ρ, β parameters. RK4… SPH FluidPhysics & MechanicsFluid simulation via SPH: pressure, viscosity, gravity and wall bouncing. Splash impulse… Kármán Vortex StreetFluid Dynamics & Aerodynamics2D Lattice Boltzmann (D2Q9, BGK) simulation of vortex shedding behind a cylinder. Adjustable… Atmospheric Optics — Rainbows & HalosOptics & LightGeometric optics in water droplets and ice crystals producing rainbows and 22°/46° halos. 1D Cellular Automata — WolframMathematicsExplore all 256 Wolfram elementary cellular automaton rules. Watch Rule 30, 90, 110 and 184… Aerofoil & Lift — NACA Wing AerodynamicsFluid Dynamics & AerodynamicsSet angle of attack, camber and thickness on a NACA aerofoil and watch streamlines, pressure…