Preface to the special issue on astroparticle physics in Canada

It is a pleasure to read these articles that show Canada's international leadership in the field of astroparticle physics. The development of the world leading low-radioactivity environment in SNOLAB following the Sudbury Neutrino Observatory experiment is providing many opportunities to pursue further properties of neutrinos and to search for interactions of dark matter particles. Canadian researchers are also playing significant roles in major experiments at the forefront of this field internationally. Astroparticle physics has become a major area of particle physics research, and it is great to see how the present generation of Canadian scientists are pursuing measurements that appear at or near the top of any ranking of important topics in physics today. Arthur B. McDonald. Co-winner of the 2015 Noble Prize in Physics.