7:30-9 pm, April 23. Rabbi Levi Dubov, director of Chabad Jewish Center of Bloomfield Hills, teaches first evening session of “What Is? Rethinking Everything We Know About the Universe.” Rohr Jewish Learning Institute course continues for five more weeks, with final date to be determined. At Bloomfield Hills High School, 4200 Andover, Bloomfield Hills. First morning session of same six-week course begins 11 am-12:30 pm, April 25, at Jewish Family Service, 6555 W. Maple, West Bloomfield. First class is free, then $80 for course, with 15 percent couple’s discount; includes textbook. RSVP: myjli.com. Info: firstname.lastname@example.org or 248-949-6210.