Congratulations, Dr. Callin Switzer!Callin Switzer successfully defended his thesis, “Bee pollination biology: buzzing, behavior, and biomechanics”! He is the Arboretum’s first PhD candidate to defend his dissertation. /wp-content/uploads/2014/11/hopkins-logowithbakg.jpg 0 0 Robin Hopkins /wp-content/uploads/2014/11/hopkins-logowithbakg.jpg Robin Hopkins2017-05-17 16:09:102022-12-17 19:55:50Congratulations, Dr. Callin Switzer!