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The overwhelming majority of African immigrants identify instead with their own respective ethnicities (~95%).African-American history starts in the 16th century, with peoples from West Africa forcibly taken as slaves to Spanish America, and in the 17th century with West African slaves taken to English colonies in North America. For the population of recent African origins, see African immigration to the United States. population of Americans of West/Central African ancestry.Pulled from the market in 1961, thalidomide caused approximately 10,000 children to be born with deformed limbs, brain defects, or other developmental deformities.Because use of thalidomide has picked up again to treat leprosy and multiple myeloma (a type of cancer), it is hoped that the new study, published in the , could contribute to the development of a similar drug that does not have the same side effects.

When CPS49 was given to chicks (chosen because chickens are one of few lab animals in which thalidomide causes birth defects) at a stage of development corresponding to that at which thalidomide was often used in pregnant women, the compound selectively affected limb development, leaving the rest of the embryo untouched.The popular conception of a race-based slave system did not fully develop until the 18th century.The Dutch West India Company introduced slavery in 1625 with the importation of eleven black slaves into New Amsterdam (present-day New York City).By 1775, Africans made up 20% of the population in the American colonies, which made them the second largest ethnic group after the English. Slavery, which by then meant almost exclusively African Americans, was the most important political issue in the antebellum United States, leading to one crisis after another.Among these were the Missouri Compromise, the Compromise of 1850, the Fugitive Slave Act, and the Dred Scott decision.

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