Deborah Kimbrell, Ph.D., University of California -- Davis (image) NASA/Johnson Space Center Share Print E-Mail Caption Deborah Kimbrell, Ph.D., senior author of the PLOS ONE article and researcher at UC Davis, gives the thumbs up signal as space shuttle Discovery launches her study subjects to space. Credit Ingemar Olsson Usage Restrictions For news coverage in connection with this news story. 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.