Biosciences’ Judith Campisi will give a talk on “The Essence of Senescence” at the next ‘EX-Ls’ Berkeley Lab Retirement Association luncheon on Thursday, Nov. 15, 11:30 a.m. to 2 p.m. at the DoubleTree by Hilton in the Berkeley Marina at 200 Marina Blvd. Cost for the event is $40. Registration deadline is Nov. 10. Questions? Contact Kathy Bjornstad, EX-Ls activity coordinator.