Most Asa H robotics experiments are done on simulators to save time and money. Sometimes we even turn off displays (renderings) to speed up the simulator. Although its easy to give a real mobile robot a wider VARIETY of sensor types than humans have (i.e., greater than the 5 human senses) it is difficult, with the exception of vision (cameras), to give the robot a large NUMBER of sensors. It is fairly easy, however, to give a simulated robot a larger number of virtual sensors. This is another reason to do as much as possible with simulators.