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.
One of the most successful English breeds of cattle, the Angus has long been the cattle âbusinessâ breed. Its black color is highly sought after in crossbreeding programs as a potential seal of Angus quality.Perhaps the most represantitve breed in cowherds, the Angus holds a well earned spot amongst all beef breeds.here is little lacking in the Angus breed; it meets the needs of a demanding cattle industry on a wide range of points. It is a docile breed, relatively hardy; cows calve easily and have excellent maternal instincts.