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Lions, tigers, and bears, oh my! From the largest to the oldest to the most fascinating, these are the best zoos in each state across the United States. Road trip, anyone?

Zoo Knoxville introduced two young Southern White Rhinos from The Wilds in Ohio to their Rhino Reserve, as part of a ...

According to the zoo, 3-year-old Gus and 2-year-old Liam are half brothers with the same father. KNOXVILLE, Tenn. — Zoo ...

Once found along the entire Pacific Northwest coast, the Oregon silverspot butterfly now survives in only a few isolated areas.

Zoo Knoxville introduced two new Southern white rhino additions, Gus and Liam on July 21. There are now four rhinos, adding to duo Mylo and Ranger.

Liam and Gus are two Southern White Rhinos who arrived in Knoxville from The Wilds in Ohio on June 30. According to the zoo, Liam, age 2, and Gus, age 3, are half-brothers who share the same father.

The population of Southern white rhinos at Zoo Knoxville has doubled following the recent addition of a pair of siblings.

The Oregon Zoo is home to many large animals – take, for example, the biggest baby in the city, elephant calf Tula-Tu. But the zoo also works with smaller animals, sometimes much, much smaller ...

The Oregon Zoo has welcomed a group of 25 Pacific lamprey, in effort to restore the population of one of the Pacific Northwest’s oldest species.

The zoo contends that the project would be much more complicated — and expensive — than simply dusting off the old tracks.

The Oregon Zoo says it welcomed 25 Pacific lamprey last week. The eerie-looking eels are part of a larger effort to restore their population to other parts in the state.