Yes. Copyright can expire (the “life plus 50” rule) and works will become part of the public domain. Material in public domain may be freely copied without permission or payment of royalties. There are also exceptions to the rights of copyright owners built into the Copyright Act, such as "fair dealing." The fair dealing exception attempts to balance the rights of the copyright owner with the needs of others, for example students and researchers, who require access to copyright protected material to pursue their studies and research activities.