The idea of a warp drive taking us across large areas of space faster than the speed of light has long fascinated scientists and sci-fi fans alike. While we’re still a very long way from jumping any universal speed limits, that doesn’t mean we’ll never ride the waves of warped space-time.

Now a group of physicists have put together the first proposal for a physical warp drive, based on a concept devised back in the ’90s. And they say it shouldn’t break any of laws of physics.

Theoretically speaking, warp drives bend and change the shape of space-time to exaggerate differences in time and distance that, under some circumstances, could see travelers move across distances faster than the speed of light.

Previous ideas about how to make these hypothetical devices have required exotic forms of matter and energy that may not exist, but a new idea for a warp drive that doesn’t break the laws of physics may be theoretically possible. However, it may not be practical in the foreseeable future because it requires ultra dense materials.