A coworker, who loves to make fun of us crazies talking about Lost at work, sent me a link from his group-think site Digg, that held a new theory.
I started reading it and closed it down. I found it too plausible and didn't want to get too spoiled.
http://timelooptheory.com//the_timeline.htm
Holy Crap! What a theory! I think its BS but it was very interesting. It might even be right-but I don't think so. Its too complicated and I'm a Sherlock Holmes fan and follow his advice. The TRUTH will be far stranger-and simpler. IMO- but what a site!
If you combine time travel and continental drift, you can explain how polar bears got both in the jungle
and in the desert.
I think the time travel will stick to the "mental-only" variety already established, which limits the ability of a person to jump only into their past or future selves. It doesn't eliminate time paradoxes but keeps things constrained enough that the storyline won't just seem arbitrary and insane. Letting people bop around anywhere and anywhen would just get out of control. There's no story when anything is possible.
There's no "time machine" per se, only some sort of radiation field generated by the Island (perhaps enhanced by Dharma) that causes the unstuckness-in-time. Unless you have another piece of the puzzle, you won't know how to control it and it will kill you. I suspect Ben and perhaps Inman (we haven't seen the last of him) know how to control it.
A couple of thoughts based on that website:
-Danielle's group might not have been innocent marine biologists who just happened to blunder across the Island. They may have been part of an ongoing "war" over control of the Island, tho who's side they were on (and whose side Danielle is on now) is an open question.
-It may be possible to time-jump before or after your own lifespan. But you would not inhabit a body. Instead, you would be an immaterial consciousness. This could explain the whispers, the apparent sentience of the Island (just a group consciousness of time travellers?) and even Miles' ability to communicate with spirits - which I've never much liked as a literal notion, too supernatural for this show.