Once a month or so, the geoblogosphere gets together to throw a blog carnival called the Accretionary Wedge. It's a fun bit of geological goodness, filled with excellent science writing all revolving around a common theme. This month, I'm hosting over at En Tequila Es Verdad, and foisted an out-of-this-world motif upon my fellow geobloggers. They did not disappoint.

There's some truly outstanding geology, from an interview with one of the Mars Curiosity scientists to optical mineralogy in space, from meteors to moons. And it includes three posts by my Scientific American colleague David Bressan! Check it out.