Tactile sensors and the gripping challenge: Increasing the performance of sensors over a wide range of force is a first step toward robotry that can hold and manipulate objects as humans do

Even a blindfolded human can tell the difference between a hammer and an egg and handle each object accordingly. But how do you instruct a robot to recognize the difference and to apply just enough pressure in handling to keep the egg from cracking or the hammer from slipping to the ground?