High-powered microscopes are useful for spotting cancer and other diseases in cells, but they're expensive and complicated. Your local physicians probably won't have a microscope on hand, and you'll probably need at least some skill to use one. However, UCLA scientists have developed a lens-free microscope that could put this tissue scanning power in the hands of many more people. The device creates a holograph-like image of your sample using a CCD or CMOS sensor (like that from your camera) to detect shadow patterns cast by a light source, and reconstructs them in software to present what you'd actually see. The result is a microscope that's just as effective as its conventional optical brethren, but should also be much cheaper and simpler.