UA biologists Carl Olson and Ronnie Sidner provide a glimpse into the world of arthropods and bats from 6:30 to 9 p.m., Saturday, Sept. 18. The event takes place at the UA Florida Canyon Research Center and is appropriate for ages 5 to 12 and their families. Directions will be provided when reservations, which are required, are made. Free. Call 615-7855, or e-mail firstname.lastname@example.org for more information.