Mark A. Williams, PhD, is a professor of cognitive neuroscience with over 25 years’ experience conducting behavioural and brain imaging research. Mark has published more than 70 scientific articles and received numerous high-profile fellowships and grants. He has made many TV and radio appearances to discuss topics including emotions, technology, education, racism, and even why we can’t tickle ourselves. His research has been featured in outlets globally including The New York Times, The Economist, The Guardian and New Scientist . He lives in Australia.