The web's best footnotes

I spent twenty minutes yesterday reading a footnote about a 19th-century patent for a self-cleaning birdcage. I had originally clicked on an essay regarding urban planning, but the author had tucked a miniature history of avian sanitation into the margins. That little superscript numeral was a trapdoor. I fell through it and came out smarter, or at least weirder, on the other side.

The modern web is mostly a flat surface designed for sliding. Content farms produce text that feels like eating a handful of dry sand; it is gritty, uniform, and offers no resistance. These sites never use footnotes because they do not want you to stop. They want you to scroll until your thumb aches, absorbing generalities that could have been written by a blender. There is no accountability in a listicle that cites nothing and links only to its own internal tag pages.

A generous footnoter is a different kind of host. They are the person at the party who pulls you aside to tell you the secret history of the host’s divorce while the music is still playing. By moving the technical data or the snarky aside to the bottom of the page, they preserve the rhythm of the main argument while acknowledging that the world is messy. It is a sign of respect for the reader’s curiosity. You are being offered a choice to go deeper or stay on the path.

Some of the best writing online happens in those tiny, six-point font blocks at the footer. You find them on obsessive personal wikis, high-end longform journals, and the blogs of people who have spent thirty years studying exactly one type of moss. These are the places where the author admits their biases or explains a joke that was too niche for the lede. It is the literary equivalent of a director's commentary track.

We should be suspicious of any writer who claims to have a perfectly linear thought process. Real research is a jagged, ugly thing full of dead ends and fascinating distractions. A site with a robust citation section is showing you its homework. It is an invitation to fact-check, to wander, and to verify. In an era of generated slop, the footnote is a certificate of human labor.

I do not want a seamless reading experience. I want a text that is prickly and dense with references I have to look up. I want to be interrupted by a brilliant digression about a forgotten Swedish architect. Give me the rabbit holes and the pedantic corrections. A page without footnotes is just a sales pitch, but a page with twenty of them is a conversation.