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.
The Icelandic Horse. The Icelandic horse is a special breed of horses that has evolved in isolation in Iceland from a now-extinct breed of Scandinavian work horses that came to Iceland with the first settlers in the ninth century. It has gained popularity around the world for its gentle disposition and friendly manner.