peristaltic locomotion

This is just an account but good stories, especially children's stories needs to have a morale towards the tale and Wall-e just isn't exception. The story is approximately how a humans had treated planet earth so while living there that they just exhaust space to dispose of all of the rubbish that they created. All the humans had left earth to travel continue to exist a spaceship for 5 years as the mess was settled by robots but the earth became toxic and killed everything that was living except a strange bug or two. 700 years later the humans remained living aboard the spaceship waiting for indications of life in order to return. Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Typical sunglasses are darkened for protection against bright light or glare; some specialized glasses are clear in dark or indoor conditions, but turn into sunglasses when in bright light. Most sunglasses do not have corrective power in the lenses; however, special prescription sunglasses can be ordered. Specialized glasses may be used for viewing specific visual information (such as stereoscopy) or 3D glasses for viewing three-dimensional movies. Sometimes glasses with no corrective power in the lenses are worn simply for aesthetic or fashion purposes. Even with glasses used for vision correction, a wide range of designs are available for fashion purposes, using plastic, wire, and other materials.