Radiation turns your dreams to nightmares, via Mother Jones:
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Researchers collected butterflies immediately following the nuclear meltdown and six months later, both from the surrounding areas of Fukushima and from various other localities in Japan. As compared with the butterflies collected from elsewhere, Fukushima butterflies showed some abnormally-developed legs, dented eyes, deformed wing shapes, and changes to the color and spot patterns of their wings, with an overall abnormality rate of around 12 percent.
While these levels of mutations were still relatively mild, more alarming were the same data on butterflies collected six months later, in September of last year. The overall rate of similar mutations among these butterflies was around 28 percent, while this number skyrocketed to around 52 percent in the second generation produced from the collected butterflies.
The study renews worries that humans, too, might be affected by the released radiation in the Fukushima area, but the researchers insist that this is not an easy line to draw.