aesmael

Although the galaxies depicted in Stargate: SG1 and Stargate: Atlantis exhibit a remarkable frequency of terrestrial, habitable planets, it is also notable that such worlds in each galaxy exhibit generally a distinct, consistent terrain.

Specifically, nearly every world on each show is a forest, and the same forest within the show, but a different one between shows. Clearly significant - this researcher thinks the Atlantis forest looks greener and has higher resolution leaves than the SG1 forest, and possibly indicative of seeding by a hitherto unknown precursor species separate to the Ancients, or possibly merely a shift in Ancient aesthetic.