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Rotate the impossible tribar to its magic viewpoint, explore Escher's endless staircase, and watch an aperiodic Penrose tiling inflate toward the golden ratio — the cognitive geometry of figures that are locally consistent but globally contradictory.
Design a guide RNA, scan a target gene for on-target and off-target sites, watch Cas9 cut, and explore NHEJ knockout vs HDR knock-in repair outcomes in an interactive CRISPR-Cas9 molecular model.
A QWZ (Qi-Wu-Zhang) Chern insulator on a 2D lattice. Sweep the mass parameter M and the Chern number C jumps between 0, −1 and +1. Whenever C ≠ 0, the sample's edge carries one-way, defect-immune states — the bulk-boundary correspondence behind topological insulators and the quantum Hall effect.
Interactive Morse code oscillator. Type a message and watch it encode into dots and dashes with the strict 1:3:7 timing, see the on-off-keyed (OOK) carrier waveform and spectrogram, and play the real telegraph tone. Adjust WPM (words per minute) and carrier frequency.
A heavy fluid resting on a lighter one is gravitationally unstable: any perturbation grows at rate γ = √(Agk), curling into mushroom-shaped spikes and bubbles. Tune the Atwood number, gravity, surface tension and viscosity and watch the live growth-rate curve.
A three-gene negative-feedback loop drives the 24-hour clock. Tune the Hill coefficient n — below the threshold n≈8 the oscillation dies, showing why circadian clocks need cooperative gene regulation.
Linearly polarized light rotates by β = V·B·L along a magnetic field. Tune B, L and material to see the polarization helix wind, the β-vs-B line, and the nonreciprocal double-pass behind optical isolators.
Two fluid layers sliding past each other destabilize at their interface into the characteristic KH billows. Tune density ratio, shear, surface tension, and toggle magnetic (MHD) stabilization.
When a charged particle exceeds the phase speed of light c/n in a medium, it emits a coherent blue shock-cone. Slide the speed and index to see the cone form, vanish below threshold, and match the acoustic Mach cone.
Near-field diffraction from half-period zone decomposition. Toggle between circular aperture and opaque disk — watch the Poisson bright spot appear at the center behind an obstruction.
Apply a vertical magnetic field and watch hexagonal spikes spontaneously emerge above the critical field Bc. A competition between magnetic energy and surface tension/gravity.
Two neutral conducting plates in vacuum attract each other due to restricted quantum vacuum fluctuations. Adjust separation, geometry, and material to explore the force.