Bay Area residents: don't miss author, filmmaker, and Mother Jones contributing writer and blogger Julia Whitty ("Gone," May/June 2007). She'll be speaking tomorrow at the California Academy of Sciences about "wonders and warnings from the oceans." Time: 2 p.m. and 7:30 p.m. Location: 875 Howard Street, between 4th and 5th Streets. Admission price: $8 for non-members.