A science explainer
How things work, explained clearly.
Questions about the physical world, from everyday curiosities to the far edges of physics, biology and computation, answered one at a time: one question, one explanation, built from the mechanism up and illustrated where words run out.
Free to read · No accounts · Sources listed on every entry
Fig. 01 · the visible spectrum380–700 nm
380 nm · 789 THz700 nm · 428 THz
Crest spacing drawn to scale: violet oscillates nearly twice as fast as red.
Mechanism first
Each entry explains why a thing happens, not only that it does.
Sources on every entry
Built from textbook consensus and peer-reviewed literature.
Figures you can move
Spectra, scales and rates are shown as things to manipulate.
01 · The library
Every entry begins as a question someone actually asked.
Filter by field, or read in any order. No entry assumes another.
03 · How this works
Questions about the method.
How topics are chosen, where the facts come from, and why each entry has a single version.
Questions are selected when a subject is widely misunderstood, badly served by existing explanations, or interesting enough that the explanation itself is worth reading. There is no fixed publication schedule and no attempt at complete coverage of any field.