Best-selling author Chelsea Clinton will present her new children’s book, Don’t Let Them Disappear: Twelve Endangered Species Across the Globe, at a special event and book signing May 23, 2019 at the San Diego Zoo.

The San Diego Zoo Safari Park is inviting the public to a special celebration next Tuesday, March 19, 2019 at the gorilla habitat inside Gorilla Forest, in honor of gorilla Joanne. She is turning 5, marking a major milestone for a youngster once called a “miracle baby” because of the challenges she overcame following complications during her mother’s labor.

Chimpanzees are well known for their extraordinary diversity of behaviors—including using tools for hunting or digging, cracking nuts with stones and using moss as a water-drawing sponge—with some behaviors also exhibiting cultural variation.