Two male African elephants born at the San Diego Zoo Safari Park—Emanti and eMacembe LaLu Hlata, better known as “Mac”—are now residing at the Caldwell Zoo in Tyler, Texas.

This week, 100Kin10—a national network with a goal of training and retaining 100,000 excellent K–12 science, technology, engineering and math (STEM) teachers by 2021—announced a key milestone during the organization’s annual partner summit at the San Diego Zoo:

The San Diego Zoo prepares to say farewell to two much-loved giant pandas—however, its conservation efforts on behalf of this iconic species will continue. In honoring the terms of the Zoo’s conservation loan agreement with the People’s Republic of China, 27-year-old female giant panda Bai Yun (pronounced bye yoon) and her son, 6-year-old Xiao Liwu (pronounced sshyaoww lee woo), will leave the San Diego Zoo in April and will be repatriated to their ancestral homeland.