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Johnson and Horgan are back on this week's Science Saturday diavlog on Bloggingheads.tv: From BHTV: In this week's episode of Science Saturday, John Horgan and George Johnson explain how the latest Jarmusch film, "The Limits of Control," conveys a message of significance for struggling science journalists everywhere. They also discuss how neural implants might improve your sex life, whether it's time to declare defeat in the war on cancer, and whether human civilization is going to be crushed by food shortages.

When will humans turn over the job of war to robot slaves? According to Peter W Singer, author of the new book Wired for War, it's happening already. In this week's Science Saturday, Peter and John Horgan discuss the role of robots in the success of the Iraq surge and whether America is starting to look like a bit like Skynet to the people of the Middle East. They also discuss reasons to fear the coming of cyborgs and whether robots might not someday bring about the end of war.

In this week's episode of Science Saturday, John Horgan and George Johnson discuss a recent debate about the identity of humanity's closest living relatives, an anthropological case study in the link between technology and violence, and the dizzying complexity of the mathematics of the financial crisis. And just in case you'd forgotten that John and George aren't fanatics about the Internet Age, they made sure to squeeze in a bit of curmudgeonly ranting against Twitter.

In this week's episode of Science Saturday, John Horgan chats with philosopher Denis Dutton about his book, "The Art Instinct," which argues that our artistic values are due, in significant part, to biological adaptations dating back to the Pleistocene. Next, John and Denis discuss sex and creativity, why there is no art of smell, and the appeal for highly abstract art.

In this week's featured episode of Science Saturday from Bloggingheads, George Johnson and John Horgan returned with new insight on the controversy provoked by their last appearance, including some negative comments directed toward ScienceBlogger Abbie from ERV. Johnson admitted that he may have been reacting to his cumulative perception of lower-end blogging, the existence of which Horgan explained by 'The law of the conservation of bullshit'—no matter how much the information sphere expands, there's still going to be the same proportion of bullshit circulating throughout it. But…