Radiation detection in the palm of your hand

After the March 2011 meltdowns at the Fukushima Daiichi Nuclear Power Station in Japan, which breached reactor containment systems and resulted in the evacuation of about 150,000 people living within 20 kilometers of the site, many people in Japan and elsewhere were concerned about contamination outside the evacuation zone. The amount of radioactivity in seafood, for example, was of particular interest.