Who played the female lead, Neytiri, in James Cameron’s "Avatar"?

Zoe Saldana

Who was condemned to push a rock uphill forever in the Underworld, only to have it roll back down? Who killed the Minotaur in Greek mythology? Which woman became queen and saved her people from destruction? The Galapagos Islands belong to which country? Who is the author of "How the Grinch Stole Christmas"?