Dr. John H.L. Hansen, University of Texas at Dallas (image) University of Texas at Dallas Share Print E-Mail Caption Dr. John H.L. Hansen stands next to the SoundScriber, the only device that could play the analog recordings of thousands of hours of communications during NASA's lunar missions. Credit The University of Texas at Dallas Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.