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.
This breed is a popular breed now in countries like Australia, and is famous for its beef. Red Angus are now a popular breed of cattle, and was ranked 9th on the U.S. list of registered cattle in 1990.ed Angus have all of the characteristics of Black Angus. The cows are hardy, and all grow quickly. They produce marbled meat like that of the Black Angus, and their meat is also highly desired in butchers, supermarkets, restaurants, and in the home.