When a unicorn is born with a mutant deficiency that adds an extra horn to its head, thus becoming a two horned unicorn, or twonicorn.

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.

Twonicorns are mystical creatures similar to unicorns, but with two horns (hence the TWOnicorn bit). They are, however, entirely their own species. Twonicorns are quite shy by nature and are so few that many people do not believe in their existence. This may also be due to the fact that that they reside in the countryside in carefully kept holes in the ground, out of the sight of prying human eyes. These holes are where they hoard any sparkly items they find and host the most magnificent tea parties.