Why are spectacular rock slides and rock-falls so common in Yosemite Valley?

Is 1991 CVPI a 351 Cleveland or Windsor? Why were salmon introduced into the great lakes? What are three main rivers of china? What is the river that flows through 9 African countries then enters the Mediterranean? Look at Tribute Money from the Brancacci Chapel. Which of these elements helps create the illusion of depth in the painting? Does Jordan allow convicted felons to visit? How do ships get from Lake Erie to the Hudson River in New York? What small scale industries are polluting the Euphrates river? How does a river becomes less steep from source to mouth? What is the size of the Statue of Liberty ear? Warmest ocean you've been in Where What temp? Can fish bite in man made lakes? What countries does the river Negro run through? Is six flags buying canobie lake park? How is smog effecting trees? How many stairs does the high point monument have? Why is Through the Tunnel a coming-of-age story? What river divides Connecticut in half? Where does the River Great Ouse start? What are the skills of a zoo keeper?