Chris Hemsworth and Alzheimer's, Jacinda's last day, brushing your teeth

Should we all be getting genetic tests like Chris Hemsworth to find out if we'll get Alzheimer's? We'll explain. It's Jacinda Ardern's last day in parliament, and we tell you that you may have been brushing your teeth wrong all these years. Awkward. Learn more about your ad choices. Visit megaphone.fm/adchoices