Here are the slides for my recent talk at Ratio Christi, "Explanations for Fine Tuning":
Click on that link to find out about:
Part I: The physics of constants and units
Part II: How physicists diagnose fine-tuning
Part III: Some examples of fine tuned constants
Part IV: My own take on proposed explanations
Regrettably there was no recording, so those of you who weren't there won't get the benefit of the marathon Q&A session. I try to put a lot of words on my slides, so hopefully most of them will be at least somewhat self-explanatory without me talking over them. (I assumed the audience was already familiar with scientific notation...)
If you want to know more about the fine tuning of constants of Nature you could check out Luke Barnes' blog or order his book. Or, if you are thirsting for a few more details about the "renormalization group flow" you could start with John Baez's explanation.