Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. In the regions surrounding the Fukushima nuclear plant disaster in northeast Japan, radioactive domestic pigs and wild boar are rapidly interbreeding. While far from the only recent incident of animal hybridization, the situation is presenting wildlife biologists with an unprecedented opportunity to examine the issue in real-time, as well as provide a template for studying the growing problem worldwide. In 2011, a 9.0 magnitude undersea earthquake in the Pacific Ocean rocked Japan. The earthquake and resulting tsunami decimated the Fukushima Daiichi nuclear plant along the coast. The massive ecological catastrophe is guaranteed to reverberate for generations. An estimated 164,000 residents in the surrounding area were forced to evacuate within hours, with potentially thousands still displaced today. The animals left behind not only included pets, but domesticated pigs on local farmlands. Although considered the worst nuclear accident since Chernobyl, containment efforts prevented a much deadlier outcome. Descendants of those escaped hogs are still roaming the overgrown fields and forests near …