Mae Kirsty Williams, Ysgrifennydd y Cabinet dros Addysg, wedi annog athrawon o Gymru i fachu cyfle unigryw i ymweld â'r Sefydliad Ewropeaidd ar gyfer Ymchwil Niwclear (CERN), yn y Swistir.
Education Secretary Kirsty Williams has urged Welsh teachers to grasp a “once in a lifetime” opportunity to visit the European Centre for Nuclear Research (CERN), Switzerland.