Brookfield Zoo has received a historic $40 million gift from a donor who wishes to remain anonymous, the largest single private contribution in the zoo's 89-year history, officials announced Tuesday.

Brookfield Zoo is celebrating a big milestone. It was a century ago when construction on the grounds began.

A small nature reserve at a tiny point on the southern coast of Peru is playing a big role in protecting endangered marine and bird species. Learn how the Chicago Zoological Society has been working with the community to engage locals in the conservation effort.