We're all going to die.

http://www.mos.org/cst-archive/article/80/9.html
http://www.space.com/scienceastronomy/pluto_warming_021009.html
http://www.space.com/scienceastronomy/060504_red_jr.html
http://www.scienceagogo.com/news/19980526052143data_trunc_sys.shtml

What a joke. Life on earth spends millions of years evolving until by chance it creates sentient life capable of producing a civilisation with the potential to colonise other planets, but the sun bellows into a red giant and destroys it and all evidence of it's existence.

Oh well. Easy come easy go.

The sun becoming a red giant is the least of our problems. After all, there is a giant black hole at the centre of the milky way, and in the uber-distant future, when we collide with, their black hole will join with ours, and they will absorb each other.

I have no idea what will happen when two blackholes absorb each other, but it can't be good.