University of Washington paleontologist Peter Ward and I are talking again on bloggingheads–this time about aliens. Ward explains why science fiction writers hate him, and why we need to breed tiny astronauts if we ever want to get out of our solar system. Check it out.

Poster from Wikimedia Commons, Headline Defiled From Shelley 

Originally published February 2, 2008. Copyright 2008 Carl Zimmer.