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.
MAY 2007 PRIMEfACT 623 Cattle breed types Brian Cumming Livestock Officer (Beef Products), Albury There are far more breeds of cattle in the world than are available in Australia, although close to 100 are represented in Australian herds.Many of these breeds have similar biological properties.AY 2007 PRIMEfACT 623 Cattle breed types Brian Cumming Livestock Officer (Beef Products), Albury There are far more breeds of cattle in the world than are available in Australia, although close to 100 are represented in Australian herds.