Despite earlier studies that suggested wildlife in the region could also suffer from radiation, scientists have found no evidence to support these claims.
Researchers think that wildlife returned to the area because it has been almost completely untouched by humans, which has allowed certain species to thrive.
Scientists have found that the population of wolves is seven times greater here than in nearby reserves.
Near the Belarus-Ukraine border, local livestock farmers are offering hunters an incentive to hunt the wolves who are killing their farm animals.
Though the lingering radiation is unhealthy for the wildlife, the effects of human activity — like hunting, farming, and forestry — are worse on the animals.
The European brown bear — an animal that hasn't been seen here in over a century — has been documented as living in the region. The area's more popular animals, like bison, live in herds.
There are still ongoing studies to find out if radiation has a negative effect on animals to the point where it will harm or kill them.