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.
Santa Gertrudis cattle have a unique American history that began, unsurprisingly, in Texas. The breed was born on land that became one of the largest ranches in the world, the King Ranch, where these cattle were built to thrive in the hot, humid and harsh conditions of the South Texas coast.anta Gertrudis cattle have a unique American history that began, unsurprisingly, in Texas. The breed was born on land that became one of the largest ranches in the world, the King Ranch, where these cattle were built to thrive in the hot, humid and harsh conditions of the South Texas coast.