The Wall Street Journal asked me to review another book. This time around it’s Virolution, by Frank Ryan. It’s about a lot of things that I’m pretty crazy about (like the viruses that make up a lot of our genome). But I wasn’t crazy about the book itself, I’m afraid. Still, the review was a good opportunity to talk about what our inner viruses may mean for our well-being. Check it out.

Originally published June 18, 2011. Copyright 2011 Carl Zimmer.