Studies in the 1980s suggest that between 2.5 and 3 percent of all people in the United States are considered mentally retarded. According to the 1990 census, 6.3 and 7.5 million people in the United States have mental retardation. The condition, which is more common in boys than girls, begins at birth or in childhood.
This article is about the Avatar film. You may be looking for the species, or the program. Avatar is a science fiction film written and directed by James Cameron, starring Sam Worthington, ZoÃ« SaldaÃ±a, Stephen Lang, Michelle Rodriguez, and Sigourney Weaver. It was made by Lightstorm Entertainment and released by 20th Century Fox on December 18, 2009.
Development of Avatar began in 1994, when Cameron wrote an 80-page treatment for the film. Filming was supposed to take place after the completion of Cameron's 1997 film Titanic, for a planned release in 1999, but according to Cameron, the necessary technology was not yet available to achieve his vision of the film.