The best speakers from the Veritas Forum
2. Belief in an Age of Skepticism at Berkeley University by Dr. Tim Keller (this is a Q and A version of Belief in an Age of Skepticism if you prefer a conversational or interview model of discussion)
3. The Journey: A Thinking Person’s Quest for Meaning by Os Guinness
4. Time for Truth: Living Free in a World of Lies, Hype, and Spin by Os Guinness
6. Can Science Explain Everything? A theoretical physicist gives his take by Ard Louis at Stanford University
8. Creation, Evolution, or Both? Fazale Rana (I seem to remember the Hugh Ross talk also being pretty good)
* Dr. Ravi Zacharias is a Catholic apolegist in my understanding, but I believe all his presentation relates to the overall Christian faith.
These are hour long talks more of which you can find at Veritas.org, you may prefer to view shorter snapshots. There are also long versions of the Veritas Forum talks available on Vimeo. Here are the other posts on Compassion in Politics which reference presentations and ideas from the Veritas Forum.