Fan Fic / Children Of Earth

An Intercontinuity Crossover between Firefly and Battlestar Galactica.

The good ship Galactica and her fleet finally get to Earth...only to find it a used-up, worthless, polluted ball of rock.

So they set off elsewhere, and encounter the Anglo-Sino Universal Alliance.

Hilarity Ensues.

Can be found here.
http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/ChildrenOfEarth