Rapid advances in technology have enabled a new generation of tiny, inexpensive, networked sensors and actuators. Embedding and networking millions of such intelligent objects into an environment creates a digital skin or wireless network of smart objects. Each object is capable of capturing physical information about its immediate space, cooperate with its neighbors, reason about its impact, and summarize the immense amounts of low-level information to produce data representative of the overall environment, and even actuate if needed. Pervasive data will change how these intelligent objects dynamically pool information, cooperate under severe constraints and reliably interact and control the physical world.