First, it is dark, meaning that it is not in the form of stars and planets that we see. Observations show that there is far too little visible matter in the Universe to make up the 27% required by the observations. Second, it is not in the form of dark clouds of normal matter, matter made up of particles called baryons.
Livestock[edit] The raising of livestock, sheep (the traditional mainstay for generations of Icelandic farmers) and cattle (the latter grew rapidly in the 20th century), is the main occupation, but pigs and poultry are also reared; Iceland is self-sufficient in the production of meat, dairy products and eggs.
Icelandic fish (All the fish) Saltfiskur (Bacalao): Saltfiskur, literally salt-fish, has been dried and salted. It has a history in scandinavia of more than 500 years, and used to be a major export before refrigeration was a thing. Recently however, it has experienced a revival in some Icelandic restaurants. HarÃ°fiskur (Stockfish): The simplest way to explain harÃ°fiskur is that it is like beef jerky. Only fish.