A new study found evidence of natural selection in the dogs of Chernobyl, but it’s still unclear what drove these genetic differences and what evolutionary advantages they may provide. A dog in the abandoned city of Pripyat. (Blinoff/iStockphoto/Getty Images) The world's worst nuclear disaster didn't only affect humans. When the Chernobyl Nuclear Power Plant experienced. "Hearst Magazines and AOL may earn commission or revenue on some items through these links.