Things I build outside research. All free, all running entirely in your browser.
Solar astrophotography and astrophysics for the 12 August 2026 sunset eclipse over the Sierra de Gredos. A consumer camera behind a homemade solar filter, then the full treatment: a computational RAW pipeline, location-dependent ephemeris math, 2D lunar transit vector recovery, and an interactive frame-inspection studio — with the derivations written up.
A daily game about the garden of forking paths. You get one dataset and 1,792 defensible ways to analyse it: choose an outcome, a subgroup, covariates, exclusions, a transform and a tail, and keep going until something crosses p < 0.05. Then the reveal shows you every path you did not take, and asks whether the finding was real. Reporting the null is a way to win.
Guess the country from its climate statistics — emissions, energy mix, temperature anomaly — with the distance and direction to the answer after every guess.