Twenty-two exceptional PhD students have been selected to be part of Yahoo!'s 2010 Key Scientific Challenges (KSC) Program, and Cristian Danescu-Niculescu-Mizil from Cornell's CS Department has been chosen to receive this very competitive award. The KSC Program supports a limited number of outstanding PhD students who we believe are doing research in very important and challenging areas. The Program provides each student with $5,000 of unrestricted funds for the support of their research activities (e.g., conference fees and travel, lab materials, professional society membership dues, etc.).