This week on Skepticality, science educator and skeptic Michael McRaeÂinterviews one of Australia's most recognizable scientists, Dr. KarlÂKruszelnicki, 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. HeÂis also a popular science commentator on radio and television, and aÂbestselling author of 26 booksâincluding his most recent,ÂPlease Explain,Âwhich gives the facts on everything from why we yawn, to the history of nearÂdeath experiences.