Porcine reproductive and respiratory syndrome virus. For the Marvel Comics Superhero, see Blue Ear (comics). Porcine reproductive and respiratory syndrome virus (PRRSV) is a virus that causes a disease of pigs, called porcine reproductive and respiratory syndrome (PRRS), also known as blue-ear pig disease (in Chinese, zhÅ« lÃ¡nÄr bÃ¬ng è±¬èè³ç).
Spanish: Enslaved Africans in Mexico, 1537 (PDF) Europeans' enslavement of Native Americans began with Columbus. As the governor of Hispaniola, he forced the Taino Indians to labor in the Spanish fields and mines, and he brought Taino slaves to Spain on his return journeys.
About 1000 years ago, as Indian people migrated north to the eastern woodlands of present day North America, they brought corn with them. When Europeans like Columbus made contact with people living in North and South America, corn was a major part of the diet of most native people. When Columbus discovered America, he also discovered corn. But up to this time, people living in Europe did not know about corn. The first Thanksgiving was held in 1621.