The Refuge was created in 1972, but this story starts 200 years earlier when Europeans discovered San Francisco Bay. Learn about the Bay’s history and the answers to mysteries such as: Why are mercury and gold a lethal duo? How did silver mining in Nevada affect the bay? Why was Oscar the Grouch happier 60 years ago than today? Join docent Larry Rosenblum to discover the answer to these mysteries and others, then take a virtual tour through one of the marshes of the refuge.