Special episode with the one and only - Paul M. Sutter!
Paul is the host of the amazing podcast: Ask A Spaceman - http://www.pmsutter.com/shows/askaspaceman
Which is VERY recommended :)

What did we talk about?
- The big bang
- The forces of nature
- Aliens
- End of the universe
- Paul's great books - http://www.pmsutter.com/book