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.
Gravity Unknown
Measure a falling probe, estimate local gravity, identify the hidden moon, and launch home.
Visual Trigonometry
Connect the unit circle, sine and cosine waves, complex numbers, and identities in one synchronized instrument.