Quirks & Quarks (Quirks) is a Canadian science news program, heard over CBC Radio One of the Canadian Broadcasting Corporation (CBC). Airing since October 8, 1975, Quirks & Quarks is consistently rated among the most popular CBC programs, attracting over 800,000 listeners each Saturday from 12:06 to 13:00. The show is also heard on Sirius Satellite Radio and some American public radio stations. The show consists of several segments each week, most of which involve the host interviewing a scientist about a recent discovery or publication, combined with in-depth documentaries; however, from time to time the show does a special "Question Show" episode, during which the format consists of scientists answering questions submitted by listeners.