Spidersilk the novel deals a great deal with alternate dimensions. Although the places tend to have different names, such as Olympia and Olympus. Recently, NASA discovered a planet that was remarkably similar to planet Earth. Even though this doesn't specifically mean it is an 'alternate' dimension it is the closest thing we've discovered that could portray a similar life sustaining planet for us. For more information on this discovery, check out this link:http://www.sfgate.com/science/article/New-planet-discovered-that-just-might-hold-life-5410479.php