Scientists at San Diego Zoo Global’s Frozen Zoo® have achieved a major milestone in saving wildlife species: This unique collection of genetic material now contains 10,000 individual cell lines from more than 1,100 species and subspecies—some of them critically endangered. 

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.