Which Native American group built cliff dwellings at Mesa Verde?

Ancestral Puebloans (Anasazi)

Who directed the historical epic film Gladiator? What animal is known as the 'king of the jungle'? What term refers to riders ensuring their horse clears a jump without penalties in equestrian events? Which actor plays Chandler Bing? Who famously said, "Speak softly and carry a big stick" regarding international policy?