Taste and smell are two of the five senses that work in tandem to create a singular sensory sensation. In this episode of TechKnow, we examine new research into the psychology of taste and smell and how past memories can instantly be remembered with just a whiff. We also look at how memorable flavours are created to support a $25bn global taste industry. More from TechKnow on: Twitter - https://Twitter.com/AJTechKnow Website - http://aljazeera.com/TechKnow Subscribe to AJE on YouTube - http://aje.io/YTsubscribe