In celebration of the 50th anniversary of Earth Day, San Diego Zoo Global is launching a Virtual Earth Day Celebration, where online visitors can participate in fun activities and gain access to educational resources—all while learning ways to better co-exist with nature.

A koala moved quickly out of a caretaker’s arms and up into a tall eucalyptus tree, while wildlife care specialists looked on. This koala is a member of an important group of the species that returned to their home in the Blue Mountains of Australia this past weekend.