There's a couple of great posts at Mac Tonnies' Blog today.

First, an update on the ongoing Mars situation; the horn fiasco. The more you read, the more you have to believe that there's no way the thing exists, unless it sprouted up between now and the last round of data taken there. More plausibly, it's either a data artifact exaggerated by an untrained analyst at the ESA, or a deliberate misdirection like the cat-box. Today, Mac turns it over to image processor Lan Fleming and optical physicist Bruce Maccabee in the latest update.

Also, check out George Dvorsky's article on Richard Dawkins new book, "The God Delusion" and the comments on Mac's blog about it in protecting our children from the god delusion. I certainly couldn't say it any better than others there did, so I won't try.