Chemical engineering major and Honors College student Sierra Yost of Windham, Maine is the 2020 University of Maine valedictorian. Yost is a member of the UMaine cross-country, and track and field teams. Her honors thesis focuses on the application of cellulose nanofibers as an alternative to plastics in disposable utensils. As part of her UMaine read more Sierra Yost: Chemical engineering major, student-athlete, valedictorian