Why did sphinxes noses disappear?

Is the level of salt the same at all depths of the sea? What are the surface features of the ocean floor and how do they know? What kind of activities are there in the Grand Canyon? Why do big cities have china towns? When did Siege of Odani Castle happen? How many elevators does the cn tower have? Was salt used in the past to preserve the dead? Where is the William L. Gregg House Museum in Westmont Illinois located? What are the minor oceans? How does the River Thames change from its source to its mouth? Why is the Eiffel Tower popular? Can you please make Bridge to Terabithia 2? What is the main idea the building of Stonehenge? What is the phone number of the Elwood Haynes Museum in Kokomo Indiana? How does dune grass survive? How many Americans swam Panama Canal? What type of engineer designs roads tunnels and bridges? How big is the Parthenon in meters? How did the Hindus make pilgrimages to the ganges? What landforms are under the Indian Ocean?