Selected conference lectures:

• International Symposium in Honour of Samuel Eilenberg, Torun, Poland, June 1993.
• Maryland-Penn State Regional Conference on Dynamical Systems and Related Topics, Maryland, March 1994.
• Topology Fest, Cornell University, Ithaca, New York, May 1994.
• Topology and Dynamical System Conference, Amsterdam, the Netherlands, August, 1994.
• American Mathematical Society Meeting, AMS Invited Lecture, Orlando, Florida, March 1995.
• Dynamical Systems Conference, Montevideo, Uruguay, March 1995.
• Banach Center Symposium on Ergodic Theory and Dynamical Systems, Warsaw, Poland, June 1995.
• 'Geometrie Complexe et Systemes Dynamiques' conference in honor of Adrien Douady, Orsay, France, July 1995.
• 'Dynamische Systeme' Conference, Oberwolfach, Germany, July 1995.
• Joint Mathematics Annual Meeting, MAA Invited Lecture, Orlando, Florida, January 1996.
• Topology Conference: in honor of Kazimierz Kuratowski and Karol Borsuk, Warsaw University and the Institute of Mathematics of Polish Academy of Sciences, Warsaw, Poland, May 1996.
• 'Dynamische Systeme' Conference, Oberwolfach, Germany, July 1997.
• ICM-98, Berlin, Germany, August 1998.
• Joint Mathematics Annual Meeting, Noether Lecture, San Antonio, Texas, January 1999.
• Topology Conference, Chico, California, June 2000.
• CBMS Lecture Series, Principal Lecturer, Macon, Georgia, 10-14 July 2000.
• Summer Topology Conference and Dynamical Systems Conference, Miami University, Oxford, Ohio, July 2000.
• National University of Mexico (UNAM) Lecture Series, Principal Lecturer, Mexico City, January/February 2001.
• Discrete Geometry, Budapest, Hungary, July 2001.
• Combinatorial and Computational Geometry, Northern Bohemia, Czech Republic, July 2001.
• Geometric Topology and Geometric Group Theory Workshop, Gainesville, Florida, March 2002.
• Geometric Theory of Dynamical Systems Workshop, Krakow, Poland, June 2002.
• Summer Topology Conference and Dynamical Systems Conference, Auckland, New Zealand, July 2002.
• Dynamical Systems Conference, Plenary Lecture, Denton, Texas, May 2003.
• Summer Topology Conference and Dynamical Systems Conference, Washington, DC, July 2003.
• 'Dynamische Systeme'', Oberwolfach, Germany, July 2003.
• Nipissing University, Topology Conference, North Bay, Canada, May 2004.
• University of Delaware, International Workshop on Geometric Methods in Dynamical Systems, Delaware, June 2004.
• International Conference and Workshops on Geometric Topology honoring Karol Borsuk's life and work on the 100th anniversary of his birth, Plenary Speaker, Mathematics Institute of the Polish Academy of Sciences, B{\c e}dlewo, Poland, July 2005.
• 'Dynamische Systeme'', Oberwolfach, Germany, July 2005.
• Eighth Annual Nebraska Conference for Undergraduate Women, Plenary Speaker, Feb 2006. Title: {\em From Fixed Points to Dynamics}
• Summer Conference on Topology and its Applications, Keynote Speaker, Statesboro, Georgia, July 2006.
• Dynamics Ideas in Geometry, Topology and Number Theory, Conference Honoring Svetlana Katok's 60th Birthday, Penn State, University Park, May 5-6, 2007
• Society for Industrial and Applied Mathematics (SIAM) Meeting, Minisymposium on Applied Topological Dynamics, Snowbird, Utah, May 2007.
• Lecture related to the acceptance of Waclaw Sierpinski Medal, Warsaw, Poland.
• 'Dynamische Systeme' Conference, Oberwolfach, Germany, July 2007.

Selected colloquia:
• Oxford University, Oxford, England, April 1987.
• Polish Mathematical Society, Bialystok, Poland, May 1987.
• Polish Academy of Sciences, Warsaw, Poland, June 1993.
• University of Chicago, Chicago, Illinois, November 1993.
• Rice University, Houston, Texas, February 1994.
• Princeton University, Princeton, New Jersey, March 1994.
• MSRI-Evans lecture, Berkeley, California, September 1994.
• Stanford University, Stanford, California, October 1994.
• University of Kyoto, Kyoto, Japan, December 1994.
• Georgia Institute of Technology, Atlanta, Georgia, January 1995.
• Northwestern University, Evanston, Illinois, February 1995.
• University of North Texas, Denton, Texas, Millikan Lecture, April 1999.
• Annual Undergraduate Colloquium, University of Kansas, Lawrence, Kansas, April 2000.
• Tulane University, September 2002.
• University of California, Davis, May 2003.
• Emmy Noether Day, Principal Speaker, Lubbock, Texas, May 2003.
• University of Sherbrooke, Sherbrooke, Quebec, Canada, March 2005.
• University of Montreal, Montreal, Quebec, Canada, March 2005.
• Cornell University, New York, April 2005.
• Georgia Southern University, Statesboro, Georgia, April 2005.
• Penn State University, University Park, Pennsylvania, December 2005.
• University of South Alabama, Mobile, Alabama, February 2006.