This week on Skepticality, science educator and skeptic Michael McRae interviews one of Australia's most recognizable scientists, Dr. Karl Kruszelnicki, who is known to most Aussies simply as "Dr. Karl." Dr. Karl is the Julius Sumner Miller Fellow at the University of Sydney, as well as a proud recipient of the Ig Nobel prize.  He is also a popular science commentator on radio and television, and a bestselling author of 26 books—including his most recent, Please Explain, which gives the facts on everything from why we yawn, to the history of near death experiences.

On this week's Skepticality, Derek talks with Dr. Phil Plait (a.k.a. "The Bad Astronomer"), Alison Smith (founder of the Skeptical Analysis of the Paranormal Society), and author Michael A. Stackpole (leader of the Arizona Skeptics) about the recent Amazing Meeting 5.5 conference on the topic of "Skepticism and Activism."

These distinguished guests also reveal details of their plans for 2008, and Phil sheds some light on possible impending "Death from the Skies",  the subject of his soon-to-be-published second book.