|Dr. David H. Staelin, seen in this undated photo, founded one of the first videoconferencing companies, PictureTel Corp.|
David Staelin, 73, scientist, discoverer, entrepreneur
In the labs and classrooms of MIT, where he worked for more than a half century as a professor of electrical engineering and computer science, David H. Staelin lived by the maxim that you can accomplish a great deal if you don’t care who gets the credit. Dr. Staelin, who co-discovered the Crab Nebula Pulsar in 1968 as a radio astronomer and later pioneered air quality monitoring networks and video teleconferencing, died Nov. 10 in his Wellesley home of liver cancer, which was diagnosed in May. He was 73.