Images in DNS
This experiment divides image data into DNS-sized fragments and reassembles them at the client, stretching a lookup protocol into bulk transfer.
Images are much larger than a normal DNS answer, but they can be divided into small pieces and recovered with a client that understands the scheme.
This pushes DNS beyond its intended scale and is therefore a strong museum specimen: technically possible, creatively awkward, and full of tradeoffs.
Primary source: https://asherfalcon.com/blog/posts/2