Or you may find this chart easily and accurately explains Lost:
I like it, but uh.. alot of that stuff has no been explained:
1) Why there are polar bears
2) Who the black smoke is
3) Why the island changes
4) Why the island is traveling through time (sort of)
5) Why Locke always has a plan
6) Why Ben is evil
Now the rest of the questions newly introduced are more interesting indeed.