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.
The first settlers in North America were Native Americans. Native Americans were the first people to settle in America. Christopher Columbus traveled to America in 1492. He traveled on a ship.he Native Americans helped the new settlers. They helped them plant food, fish, hunt and build houses. The Pilgrims celebrated the first Thanksgiving. They invited the Native Americans to celebrate with them. Many people from Europe came to America. Their towns were called colonies.