Solar vs. Sidereal
Visualize why the Earth rotates 366 times in a 365-day year. Inspired by Martin Gardner.
Geometric Tilings
Explore tessellations and patterns. An interactive playground for generating geometric art.
Mystery Box Game
A game where you try to guess the proportion of red balls in a box. But it will cost you.
Fourier Series Explorer
Explore the Fourier series of different waveforms.
Geometry of Least Squares
Connect a line through three observations to projection onto a model plane in three-dimensional observation space.
Moon Drop Experiment
Drop a ball from a 100 m lunar tower, click at every red flash, and recover the Moon's gravity from your own reaction time.
Visual Trigonometry
Connect the unit circle, sine and cosine waves, complex numbers, and identities in one synchronized instrument.