Re: There must be a second Earth...
There is no second Earth. This is the writer's rebellion against shiny, happy Star Trek. He took a huge depressing dump on BSG and this dreary ending is all we get. I was tired of Vancouver in summer, in winter it is even uglier.
sometimes in real life a villain will burn your house to the ground, kill your family, rape your wife, and shoot your dog and then laugh because he liked it. Some people are just assholes.