A month-long exhibition honoring the life and work of science illustrator Marie Siegenthaler opens in Point Reyes Station this weekend. The exhibit, put on by the foundation Tentacles & Wings, will display about 15 works inside the gallery space at the West Marin Culture Shop, with a reception Sunday from 1 to 4 p.m. Connie Siegenthaler, the mother of the late artist and the founder of Tentacles & Wings, said Marie’s passions for art and…