Bryan Ballif, University of Vermont (image) University of Vermont Caption With skilled handling of this mass spectrometer, University of Vermont biologist Bryan Ballif unraveled the mystery of two little-understood blood types. Now he and his international colleagues are looking for more. Credit Joshua Brown, University of Vermont, 2012 Usage Restrictions With associated article 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.