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.
And sometimes, those qualities are extraordinary. Here are some of the more visually amazing breeds of cattle from around the world. Texas longhorn cow. This breed is descended from a mix between a breed from Iberia and a breed from India, and they were some of the first cattle brought to North America by Europeans. The longhorn is well known for, well, long horns.