Someone mailed me a question about what is the name of the biggest dragon?
The obvious answer is that the biggest dragon is the Midgard Serpent, Jormungund, who is literally world-spanning (he encircles the earth).
Looking up more info (and a better answer) i ran across Phil Hine’s meditation on Thor, a scientific article about animal size, the promising but quite incomplete Dracopedia (which I found by looking up Ancalagon the Black – searching for Dragons+Size just gives a ton of pages selling Dragon brickabrack). Best of all (as usual) are the loony sites.
In the end it occurs to me that the Biggest Dragon is the constellation Draco, which is light-years across…