Nine-year-old Olivia Smith had plenty to choose from as she walked through the Academy of Natural Sciences on Friday, surrounded by dinosaurs, wildlife and exhibits that have fascinated generations of children. The fourth grader knew exactly what she liked best. “We have seen a lot of exhibits. My favorites were the pandas. Oh, and the rabbits!” Olivia said as she toured the museum with her teacher, Sandy Debies. But Olivia was among the young visitors getting what could be one of their final looks at the museum before its doors close permanently. The Academy of Natural Sciences, the 200-year-old institution...