![A depressed male chimpanzee lays his head on his arm. In "How Animals Grieve," Barbara J. King writes about how chimpanzees and other nonhuman animals' emotional and social lives.](https://www.nonhumanrights.org/wp-content/uploads/depressedeldermalechimpanzee_SandraMcEvoy-e1494872137369.jpg)
Travis, Tragedy and the Other Chimpanzees
![](https://www.nonhumanrights.org/wp-content/uploads/Animal-Behavior-Blog-Posts-768x512.jpg)
Orca Family Cares for Disabled Calf
![](https://www.nonhumanrights.org/wp-content/uploads/Animal-Behavior-Blog-Posts-768x512.jpg)
Why You Lie Like an Ape
![](https://www.nonhumanrights.org/wp-content/uploads/Animal-Behavior-Blog-Posts-768x512.jpg)
Chimpanzee Conducts 3-Year Study on Primates
![](https://www.nonhumanrights.org/wp-content/uploads/Issues-Blog-Posts-768x512.jpg)
Why “Animal Rights” Is a Contradiction in Terms
![](https://www.nonhumanrights.org/wp-content/uploads/Animal-Behavior-Blog-Posts-768x512.jpg)
The Nature of Dolphins
![](https://www.nonhumanrights.org/wp-content/uploads/Animal-Behavior-Blog-Posts-768x512.jpg)
Time to Pack the Trunk for Elephants
Animal rights: It’s Not an Either/Or Proposition
![A still shot from the film Blackfish](https://www.nonhumanrights.org/wp-content/uploads/2013/12/seaworld-blackfish-122713.jpg)
Thoughts on the hearing in PETA’s SeaWorld slavery lawsuit
Sign up to receive the latest updates on our mission
Find out about opportunities to get involved, breaking news in our cases and campaigns, and more.