The internet abounds with unlikely stories of how to make thousands of dollars by doing little or nothing, but here's one money-making scheme that's actually true: A Massachusetts-based nonprofit is paying people up to $13,000 per year for turning over their stool samples. The samples are then used to help fight a rare bacteria called C. difficile. In other science news, an eight-year-old girl may have just made some serious headway in finding a cure for cancer. Camilla Lisanti's parents are cancer researchers, and the child suggested to them that they use antibiotics, "just like when I have a sore throat." It just might be simple enough to work. UK lawmakers voted this week to allow in vitro fertilization using DNA from three people. The technique would be used to eliminate mitochondrial diseases in IVF babies. The FDA recently revealed that several herbal supplements found on the shelves of GNC, Walmart, Walgreens and Target don't contain the ingredients they claim. Instead, they're filled with cheap substitutes, like wheat and soy powder. On the green tech front, the folks at the Oakland-based 3D-printing firm Emerging Outfits have developed a 3D-printed ceramic "Cool Brick" that uses nothing but water to cool homes in hot, dry climates. The brick is now on display at the Museum of Craft Design in San Francisco. In wearable tech news, the PC security firm Symantec (best known for its Norton security products) has teamed up with Betabrand to create a pair of jeans designed to stop so-called digital pickpockets from poaching your personal data. And if you've ever walked around New York City and wondered why USB drives are embedded in building walls, click here for the full story.