A virtual world, also called 3D Metaverse, is a computer-based simulated environment intended for its users to inhabit and interact via avatars. Avatars are usually depicted as textual, two-dimensional, or three-dimensional graphical representations, although other forms are possible(auditory and touch sensations for example). Some, but not all, virtual worlds allow for multiple users.
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Google Earth allows users to view satellite imagery, maps, terrain, 3D buildings, from galaxies in outer space to the canyons of the ocean. It allows users to share with others.
