Associate Professor Rebecca Koopmann presented two papers in June at an International Astronomy Union Conference entitled “Dark Galaxies and Lost Baryons”, held in Cardiff Wales. The papers, entitled “Virgo Early-Type Dwarfs in ALFALFA” and “A 500 kpc HI Tail of the Virgo Pair NGC 4532/DDO 137 Detected by ALFALFA” describe Koopmann’s research on the hydrogen gas contents of nearby galaxies as revealed by the ALFALFA (Arecibo Legacy Fast ALFA) survey. Koopmann spent her sabbatical 2006/2007 year at Cornell University as a Visiting Scientist with the  National Astronomy and Ionosphere Center (NAIC) , which operates the Arecibo Observatory in Puerto Rico.