Gorilla Valley at Henry Doorly Zoo in Omaha, Nebraska

Click here to see the Gorilla Valley at Henry Doorly Zoo in Omaha, Nebraska

Related:
More than 100,000 rare gorillas found in Congo. CNN, 08/2008.
Has anyone ever seen a photo of a happy captive gorilla? Flickr.
Experts not surprised by chimp's vicious attack: Primates' strength, agression cited. The Advocate, 02/2009.

Updated: 02/22/2009