Based on the 17-volume print encyclopedia, this resource features information on more than 4,000 species, presented with more than 12,000 photos, maps, videos, audio clips, and interactive tools. Articles written by scientists and subject experts are peer reviewed and selected by an expert editorial board. Entries can be translated to many languages and text-to-speech.

This resource features encyclopedia entries focused on evolution, supported by subject specialists and peer-reviewed by an editor and editorial board comprising of evolution experts. This is a supplement to Grzimek’s Animal Life Encyclopedia (2003), and compliments a companion volume, Extinction (2013).

This resource features more than 80 topically arranged, comprehensive articles, focusing on extinction. Suggestions for further reading, lists of scientific organizations & contact information are included. This is a supplement to Grzimek’s Animal Life Encyclopedia (2003), and compliments a companion volume, Evolution (2011).