Lawrence Krauss is a professor in the Department of Physics at Arizona State University. His lecture entitled Life, the Universe and Nothing was recorded at the Isabel Bader Theatre in Toronto on March 27th, 2009.
http://www.tvo.org/TVOsites/WebObjects/TvoMicrosite.woa?bi?1255208400000
No mystery is bigger than dark energy - the elusive force that makes up three-quarters of the Universe and is causing it to expand at an accelerating rate. Join a panel of Lawrence Berkeley National Laboratory scientists who use phenomena such as exploding stars and gravitational lenses to explore the dark cosmos.
http://www.uctv.tv/search-details.aspx?showID=17426&subject=pet
Please Explain is all about matter, anti-matter, and dark matter. Lisa Randall, Professor of Theoretical Physics at Harvard University; Michael Tuts, Professor of Physics at Columbia University and Mordecai Mark Mac-Low, Chair of the Department of Physics at the American Museum of Natural History tell us all about what it is and what it means.
Neil Turok on the "Endless Universe" and the Q2C:Quantum to Cosmos Festival.
http://www.tvo.org/cfmx/tvoorg/theagenda/index.cfm?page_id=7&bpn=779637&ts=2009-10-16%2020:00:00.0