Scientists are worried about how to keep the Sphinx from falling apart again. Instruments have been placed on the Sphinx to monitor moisture, pollution, and wind speed. Scientists have talked about building a wall around the Sphinx to protect it from the wind and sand. Perhaps completely covering the Sphinx with a glass pyramid would work. Some think that burying part of it in the sand would protect it from the wind, sand, and pollution One scientist suggested building a movable shelter. This shelter could protect the Sphinx at night and during bad weather. During the day, the walls of the shelter could be retracted into the ground. Visitors could see the Sphinx without the protective walls. There are no easy solutions. The one thing that is agreed upon is that something needs to be done.