How was the orinoco formed and made?

Where is the Kettle Falls Historical Center in Kettle Falls Washington located? What terrain lies along both sides of the Nile river? What is the first fable of the Incas about Titicaca? Does Hawaii have any rivers or lakes? What was a major effect of the canal craze of the early Th century? Who wanted to build the Millau Viaduct? Why do adult orangutans need a large area of forest to survive? What ocean did Admiral Peary fight icebergs in? What body of water borders Alaska? What was the Syndney harbor bridge made from? Are northern currents always cold? Who is known as the Girvan lighthouse? What was the Nile river valley an ideal place for? What part of the land surface do tropical rain forests do they cover? Is Adam savage married? Why did the Yellow River flood so frequently? What are facts about the Red Sea? Is there nice beaches in the Congo? Which sea is it easy to float pacific or Atlantic and why? Do beavers live in the Hoover Dam?