Japanese scientists have looked at several generations of butterflies near the power plant and found some concerning "abnormalities."
A massive release of radioactive material is never good, but so far it's been hard to evaluate the precise effects of the collapse of the Fukushima Dai-ichi nuclear power plant on the surrounding environment. But this new study, published in Scientific Reports, is concerning. Japanese scientists have looked at several generations of pale grass blue butterfly populations in the affected area and have found physical mutations and genetic damage. In short: mutant butterflies.