Rabbits with horns: io9 offers an excerpt of A Planet of Viruses

Over at the science-fiction/science web site io9, you can find an excerpt from  A Planet of Viruses. There's a lot about viruses that seems tailor-made for science fiction fans, but I have to say the folks at io9 zeroed in on the sci-fi-est of them all: a virus that can make rabbits grow horns, turn people into trees, and make human cells outlive their owners. Check it out!