Dr. Krzysztof W. Fornalski graduated from the Faculty of Physics, Warsaw University of Technology (WUT), Poland, in the field of nuclear and particle physics. He obtained his PhD degree in the National Centre for Nuclear Research (NCBJ), Poland, in the field of radiation biophysics, and his DSc degree from the Faculty of Physics, WUT. His main fields of interest include physics of life, radiation physics, radiation biophysics, low-dose research, radiation protection, adaptive response and cancer physics. He is a Polish delegate to UNSCEAR.