The Weston Observatory, Boston College’s center of geophysical research, offers periodic colloquiua open to the public. The next one will be on October 2, 7-9PM, on The Geological History of Cape Cod, presented by Dr. Ken Galli. The observatory is at 361 Concord Road in Weston. Seating is limited and reservations are required. Email anastasia.macherides@bc.edu to reserve a seat. Three days later, the speaker will lead an all-day field trip, A Geologist’s View of Cape Cod, on October 5, 8AM-5PM, starting and ending at the Weston Observatory parking lot.