Sienna Craig, Dartmouth College (IMAGE) Dartmouth College Caption A new study by Dartmouth Professor Sienna Craig and researchers from Case Western Reserve University, Washington University and Oxford University raises the specter of a massive population decline in ethnic Tibetan communities in Nepal's highlands. Credit Dartmouth College Usage Restrictions Credit Dartmouth College License Licensed content 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.