Primary colors are not a fundamental property of light but are related to the color vision system in animals. The human eye normally contains only three types of color photoreceptors (L, M and S) that are associated with specialized cone cells.
No. 15; Updated October 2015. Approximately 120,000 children are adopted each year in the United States. Children with physical, developmental, or emotional handicaps who were once considered difficult to place with a new family are now being adopted (special needs adoptions). Adoption helps many of these children to grow up in permanent families rather than in foster homes or institutions.
1 International adoptions accounted for 13% (17,416) of all adoptions in 2008. 2  In 2000, 14 percent of all adoptions were of children from foreign countries. 3  Other adoptions (private adoption from adoption agencies or adoption attorneys, tribal, step parent) accounted for the restâabout 46% (63,094) in 2008. Adoption from foster care accounted for 41% (55,303) of all adoptions in 2008. 2  In 2000, they made up 40 percent of all adoptions. 3  International adoptions accounted for 13% (17,416) of all adoptions in 2008.