Japan nuclear disaster causes mutant butterfly
An undated handout photograph released by Joji Otaki, an associate professor of biology at the University of the Ryukyus on Aug.14, 2012, shows a healthy adult pale grass blue (Zizeeria maha) butterfly. (Photo)
Severe mutations were found in butterflies collected near the Fukushima Daiichi nuclear power plant according to Japanese news reports on Aug.13, 2012. Exposure to radioactive material from the nuclear accident has caused the mutations, according to the team of scientists conducting the survey published in the journal Scientific Reports.
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（Editor：陈丽丹、张茜）
