Night Explorers - Owls, stars, bugs, things that go bump, and some that glow are seen at the Gumbo Limbo Nature Center, 1801 N. Ocean Blvd., Boca Raton. Hike with creatures of the night along the boardwalk, see the tanks under a different light, and peek at the night sky courtesy of the Palm Beach County Astronomical Society. For ages 7-adult, children must be accompanied by an adult. Please do not bring flashlights; your guide will light your way. 6:30-9 pm. $7/members, $10/non-members. Reservations and pre-payment required: 338-1542 or www.gumbolimbo.org.