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.
There are approximately  5,000 children in foster care in Virginia. Of these children and youth, 1,700 have the goal of adoption, and more than 700 of are waiting for adoptive families. These children are from all cultural and socio-economic backgrounds.