Physics is speeding toward finding theoretical particles and answers to universal questions.
Black holes are the dense gravitational objects that capture to not let light out. Scientists have found the mysterious "god particle," and evidence of gravitational waves (disruptions of the space-time) near black holes. The missing piece is called dark matter, which theorists believe makes up most of the gravity element in the universe. How all three of these things interact with each other is still not understood.
When most people think of time, it is a linear concept. Seconds, minutes, hours, days, weeks, months, years . . . a progression moving forward in an aging process.
When some scientists think of time, they think of it as a coordinate in space which could theoretically manipulated like folding origami paper. The sci-fi community knows this concept as "warp drive."
In order to conquer the vastness of space, physical propulsion will not work because the human life span will not allow deep space exploration. Brilliant minds insist there has to be another wave.
Tapping into the largest "resource" in space would help solve a propulsion question. If the universe is made up of mostly gravity. And if gravitational waves can be equated with waves on our oceans, it is possible that there may be deep space gravitational "currents" which can accelerate ships at great speeds across the galaxies.
Alien seed theorists believe that advanced humanoid races seeded the universe with proto-humans to allow them to evolve into civilizations. One could assume that enlightened elders would give their offspring the tools to solve complex problems - - - by applying known concepts and experiences to hypothetical problems. Therefore, the concepts of ships navigating on ocean currents can be an analogy to solve space travel. You just need to find comparable elements.
For if gravitational waves can be harnessed, then the concept of space time can be changed to artificially elongate human life spans. A human with an average life expectancy of 75 years could go through space time travel hundreds or thousands of years to experience something not possible from his Earth bound existence. Many theorists think that forward space time travel would be possible; but most think it is a one-way journey to the future.
If we look to the symbols in LOST, we can find some off-beat similarities to modern physics theories. The series "dark matter," was the mysterious black cloud of shifting matter. The Swan station's purpose of holding back a large electromagnetic charge from purple flashing the island can be viewed as a "wave" generator which shifts time and space of island inhabitants. The frozen donkey wheel was one such early generator as it took both Ben and Locke back in time and across the globe. And the island itself is symbolic of a black hole, so unique that it could not be viewed with the naked eye. It took an observation station and precise coordinates to find it.
Taken together, the island could have been a massive space-time travel experiment which may have been abandoned because of its inherit inability to be controlled by man.