Google X is always looking for the next moonshot. The semi-secretive lab where the company has tested everything from self-driving cars, to internet broadcasting balloons has had a real fixation on health and longevity recently. The latest project involves using tiny nanoparticles that patrol the body looking for early signs of cancer or other diseases. Basically the particles, which would be just a thousandth of the size of a red blood cell, would be designed to bind to specific cells or proteins. One of the suggested delivery methods is to swallow a particle-packed pill. A magnetic wearable would then attract and count the particles, hopefully delivering an early warning to doctors. Andrew Conrad, head of the Life Sciences team at the Google X, revealed the project at The Wall Street Journal's WSJD Live conference. He said that he hopes this will provide a one-stop-shop for medical testing eventually, but acknowledged that we're probably about five years off from any serious implementation.