On Saturday, October 6, from 10 a.m. to noon, Dr. Tony Dalrymple of Northwestern University will present "Swim for Your Life! Waves and Currents in Lake Michigan," at the Arrington Lakefront Lagoon Shelter, 1631 Sheridan Rd.

The event is part of the Watershed Learning on the Great Lakes series. Each workshop includes a short talk, discussion/ hands-on activity and tea. No registration is necessary; just drop by. Come prepared to walk outside. Accessible. For more information, email Clare at clare@lakedance.org.