How does our brain remember things? Neuroscientist Andre Fenton found that question has no easy answers. Andre has spent years experimenting with PKMZeta, a tiny molecule he believes is the key to forming memories. But what if he’s wrong? This is a personal story of the scientific process, and the bumps along the journey that lead to knowledge.Welcome back to Season 3 of Tumble! We're so excited to be back with all new episodes - from Barcelona, Spain! To kick it off right, we're doing a Patreon pledge drive to get to 100 Patrons! You can donate any amount to vote on where we'll go in Barcelona and what we'll share with you on our Patreon blog. To pledge, go to patreon.com/tumblepodcast.Send your questions, drawings, and recordings to tumblepodcast@gmail.com