The mothers who set up a radiation lab
They saved and collected $600 (£420) to buy their first Geiger counter online, but when it arrived the instructions were written in English, which none of them understood. But they persevered and with the help of experts and university professors, organised training workshops. Soon they knew all about becquerels, a unit used to measure radiation, and sieverts, a measure of radiation dose. They would meet at restaurants and cafes to compare readings.
