WASHINGTON, April 3 (UPI) -- Remember the robot in Terminator 2 that oozed through tiny cracks and then reformed itself? So does the U.S. Defense Department. The Defense Advanced Research Projects Agency last week issued a request for proposals to develop a "chemical robot" made of soft, flexible materials that can squeeze through openings smaller than its static dimensions and then reconstitute itself to perform a task military task. "Nature provides many examples of ChemBot functionality. Many soft creatures, including mice, octopi, and insects, readily traverse openings barely larger than their largest "hard" component, via a variety of reversible mechanisms,"...