The Sun Will Eventually Engulf Earth--Maybe: Scientific American

The Sun Will Eventually Engulf Earth--Maybe: Scientific American: "The sun is slowly expanding and brightening, and over the next few billion years it will eventually desiccate Earth, leaving it hot, brown and uninhabitable." And by that time we, that would be human descendants living at the time, would have moved the earth to a more favorable location. The delta V would not be impossible and they would probably use the radiation from the sun as the energy for something like a solar sail on the moon to drag the system out.