Scientists bringing retroviruses back to life

It'd take me an absurd amount of time to do a decent job writing a summary, and I don't like cut and pasting lots of text. But this is an awfully interesting story about retroviruses, how they've blended with our DNA since man's beginning, and how scientists are isolating their broken parts and reanimating them. If you like Michael Crichton novels, this article's for you. Via.