Without getting too technical, the science involves targeting and removing what are known as senescent cells, or cells that serve as "emergency brakes," preventing dangerous or cancerous cells from multiplying out of control. The trouble is, as we age, these senescent cells don't leave. They linger around in our bodies and actually inflame the regular cells around them, causing conditions like arthritis, macular degeneration, and kidney disease. The trick, essentially, is to find a way to make these senescent cells self-destruct once they've served their purpose. Cellular suicide, if you will. It's not some pie-in-the-sky theory, either -- studies have shown that mice appear to stop aging after their senescent cells are removed.