http://www.space.com/32712-warp-drive-hyperspace.html
EXCERPT: [...] The concept of hyperspace travel is also known as hyperdrive, subspace and warp speed. But the dearth of research and scholarly discussion on the transportation method make it more often a convenient literary device than scientific possibility, Shostak said. Physics suggests that shortcuts through space do exist, Shostak said. [...] A spacecraft could theoretically skip ahead to a distant region of space if it enters such a wormhole between the two locations. [...] However, our access to these inter-space freeways would be limited by the size of the portal. "Wormholes, we think, are made all the time on a microscopic level," Shostak said. "But the question is, can we actually use them for transportation?"...
EXCERPT: [...] The concept of hyperspace travel is also known as hyperdrive, subspace and warp speed. But the dearth of research and scholarly discussion on the transportation method make it more often a convenient literary device than scientific possibility, Shostak said. Physics suggests that shortcuts through space do exist, Shostak said. [...] A spacecraft could theoretically skip ahead to a distant region of space if it enters such a wormhole between the two locations. [...] However, our access to these inter-space freeways would be limited by the size of the portal. "Wormholes, we think, are made all the time on a microscopic level," Shostak said. "But the question is, can we actually use them for transportation?"...