Irrationality – Weight Loss (!!) and Everything Else | Karl Kruszelnicki | TEDxUNSW

Most of us like to think of ourselves as (somewhat) rational human beings.
Impulse buying? Never! Climate change? Sceptics exist. But what about when it comes to
dieting? According to Dr Karl Kruszelnicki, here is a multi-million-dollar industry which thrives
on irrationality overruling all scientific and statistical evidence. Just check out the Paleolithic
diet, and you’ll see what we mean.

Dr. Karl Kruszelnicki is one of Australia’s 100 National Living Treasures and has a media career spanning more than 30 years. His accolades range from the Ig Nobel Prize from Harvard University for his groundbreaking research into belly button fluff, to being one of the first Australian Apple Masters, of which there are only 100 worldwide. A lifetime student, Karl has earned degrees in Physics and Maths, Biomedical Engineering, Medicine and Surgery. He is currently the Julius Sumner Miller Fellow at Sydney University, where, armed with his infectious enthusiasm, he aims to spread the good word about science and its benefits.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at


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