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Tools to be developed include an array of optical probes and sensing devices that can be used to detect the different states and functions of cells, tissues or fluids. Developing a means of learning more about the communal behavior of cells is central to advances in biological sciences. It also is essential for better understanding of how tissues and organs function. The eventual results of their work will give scientists the ability to create new diagnostic tools and monitor many substances simultaneously in cell cultures, living animals and patients. By packaging the tools into a small, implantable microchip, for example, the scientists believe it will be possible to diagnose disease at an early stage in humans.