Sage is a permanent addition of the Carnegie Museum of Natural History's Dinosaur Hall exhibit area. Sage is a completely autonomous mobile multimedia exhibit built on top of the XR4000 robot base by Nomadic Technologies, Inc. It wanders Dinosaur Hall on a planned path and provides video and audio enhancements to the exhibits for museum visitors.
Sage navigates using a single color video camera. Artificial landmarks placed in Dinosaur Hall help it orient during its journeys. Sage also avoids all forms of collisions, using 48 sonar sensors, infrared sensors and tactile sensors covering the bottom half of the robot.