William J. Clancey tags along when NASA researchers visit a crater 500 miles north of the Arctic Circle to explore its Marslike environment. “The scientists are studying the crater, the geology and biology of this land, and I’m studying the scientists,” Clancey said. He wants to see how they go about their business to develop ways that computers and other devices can be used to help astronauts explore Mars. Clancey, of the University of West Florida’s Institute of Human and Machine Cognition in Pensacola, is on loan to the NASA Ames Research Center at Moffett Field, California.