Dark matter is observed by the gravitational effect that  it has on radiation and the visible universe. The gravitational  force it has from dark matter plays a critical role in the shape of  the galaxies orbit and the because of the hot gases in the groups  of galaxies.
The Angus breed is perhaps the most used, most well-known breed of beef cattle in the U.S. With origins in northeast Scotland, Angus, also known as Black Angus, is popular among Brits and Americans and was first imported to the United States in 1873.
Brahma cattle were produced by cross-breeding Kankrej, Gujarat, Ongole, and the Gir (or Gyr) strains. The Brahman is one of the most popular breeds of cattle intended for meat processing and is widely used in Argentina, Brazil, Paraguay, United States, Colombia and Australia among many other places.