Interactive science explainers
Science you can play with.
Read the explanation, then drag the sliders and watch the model respond — pendulums, Fourier transforms, Bayes' theorem, black holes. Every article ships with two hand-built widgets you can break on purpose.
- 171explainers
- 9fields
- 12learning paths
Quadruple a pendulum's length and it swings only twice as slowly.
Not four times. Drag the length and watch the period — this is what every article here does, at its smallest.
A quarter as long gives 1.00 s — half, not a quarter, because the length sits under a square root. Small-angle approximation, and gravity taken as 9.81 m/s².
Browse all 171 explainers
Each one is a written explanation with two interactive widgets built into it. Pick a field, or just start scrolling.
Showing 24 of 171