Jacob Namminga , one of our radiation safety advisors, spoke to me via Skype about today's sampling trip in a rural area of Japan, to the north west of the Fukushima nuclear plant. We'll be reporting the details of our findings  once...

The crisis at the Fukushima Daiichi nuclear complex has been upgraded from a level 5 to a level 7 on the International Nuclear Events Scale (INES), one month after the earthquake and tsunami that first damaged the Japanese power plant.