There are other indications. The closer to earth the fleet gets, the older the artifacts of the “13th tribe” become. Kobol was abandoned 2000 years prior to the current events. The lion’s head beacon was said to be about 3000 years old. The Temple of Five 4000 years.

StormKing – I think this is a very good point. I actually have some new thoughts on BSG, and I’ll be posting them soon. Thanks for the comments!

Wrong. The colonials believe that the human race originates on Kobol. But why should the flags of the twelve tribes include star patterns that can only be seen from earth?

Because earth is not a 13th colony, it’s humanities birthplace. Kobol was colonized from there an the 13th tribe was either returning to its origin or is just a myth. Maybe there was never a 13th tribe on Kobol and stories about the “brothers on earth” became stories about a “13th tribe of humanity, who left Kobol to settle on earth”.

The “Jealous God” may just be Count Iblis.

(See original BSG episode “War of the Gods”)

I think we are seeing Pre- History Earth and the soon to be sunken city of Atlantis.

“The continent of Atlantis was an island
which lay before the great flood
in the area we now call the Atlantic Ocean.
So great an area of land, that from her western shores
those beautiful sailors journeyed
to the South and the North Americas with ease,
in their ships with painted sails.

To the East Africa was a neighbour, across a short strait of sea miles.
The great Egyptian age is but a remnant of The Atlantian culture.
The antediluvian kings colonised the world
All the Gods who play in the mythological dramas
In all legends from all lands were from fair Atlantis.
Knowing her fate, Atlantis sent out ships to all corners of the Earth.
On board were the Twelve:
The poet, the physician, the farmer, the scientist,
The magician and the other so-called Gods of our legends.
Though Gods they were -
And as the elders of our time choose to remain blind
Let us rejoice and let us sing and dance and ring in the new
Hail Atlantis!”