The fan-created reference site Lostpedia attempts to make sense of the mystery, and while visitors may leave the site more confused than when they arrived, they'll certainly enjoy working their way through the hundreds of wide-eyed theories about Lost's characters, episodes, plots, buildings and obscure fleeting references.

Curious about the four-toed, broken statue seen in the season finale? Then consider the "alternative evolution" theory, in which the statue represents advanced humans who've lost their pinky toes; the "ancient origins" theory that proposes the island is related to the lost continents of Atlantis or Mu; or the "clever ruse" origin, in which the statue is part of the island's larger mind game. Intrigued by the notorious "Numbers"? Then check out the episode-by-episode lists of their appearances (either individually or as the full sequence) and theories about what they could represent, such as the elements needed to build a super weapon, geographic coordinates on Earth or some sort of map to the island's hidden facilities.

Those who can't wait for the series' third season to start can use Lostpedia to get caught up on the Lost Experience alternative-reality game. The site explains the game's revelations and clues and, naturally, offers plenty of theories for everything seen and unseen.

If a particular theory isn't found on Lostpedia—or if some key detail is missing—fans can add it by creating an account on the wiki and posting their own ruminations to one of the site's 1,000 pages.