It's time for another edition of Science Medley, your guide to the science posts written by women bloggers. This time we're focusing on science related to the human body. At Aetiology, guest blogger Whitney Baker looks at possible infectious agents for obesity:

"If I could tell the story in words, I wouldn't need to lug around a camera." --Lewis Wickes Hine Confession: I often struggle with this ironic assignment – writing about photography. The true magic of a visual image is that words become unnecessary, hence the well-worn cliché, “A picture is worth a thousand words.” (Though with inflation and everything, a picture is probably worth at least 5,280 words by now, give or take a few adverbs.)