Brad Baltensperger, chair of the Department of Cognitive and Learning Sciences and professor of geography, is retiring after 40 years at Michigan Tech. The campus community is invited to attend his retirement party on Wednesday, April 30, from 3:30 to 5:30 p.m., in Memorial Union Ballroom A2. Please join the department in celebrating his career and wishing him an enjoyable retirement. Refreshments will be provided!