Karl Sven Woytek Sas Konkovitch Matthew Kruszelnicki, often referred to as "Dr Karl", is an Australian science communicator and populariser, who is known as an author and a science commentator on Australian radio, television, and podcasts.

Australian Skeptics is a loose confederation of like-minded organisations across Australia that began in 1980. Australian Skeptics investigate paranormal and pseudoscientific claims using scientific methodologies. This page covers all Australian skeptical groups which are of this mindset. The name "Australian Skeptics" can be confused with one of the more prominent groups, "Australian Skeptics Inc", which is based in Sydney and is one of the central organising groups within Australian Skeptics.