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.
A black Angus cow is one of the many breeds of cow from which we get steak and other meat. If there is one thing that people love about dinner, it is having a plate filled with veggies, mashed potatoes and a big juicy steak. Steak is probably the most popular dinner item for those who are craving meat.