The University of Colorado at Boulder Libraries presents "Youth Around the World," a photo exhibit by Marilyn Wertheimer, in the Norlin Library third floor northwest gallery through March 31. Wertheimer, a retired CU-Boulder librarian, has taken thousands of pictures since 1960 during extensive world travel. The exhibit, featuring 50 pictures of young people taken in 29 different countries, also was displayed at the Boulder Public Library last fall.