Memory is complex. Every time you recall something, you’re pulling information from different regions of your brain, all combining to reconstruct what happened and how you felt about it. But when you recall something, you’re not replaying the original recording. Each time you recall it, that memory is altered — moulded by how you’re feeling or what you’re doing at the time. This happens without us knowing it. With Richard Roche (NUI, Maynooth) and Aine Kelly (Trinity College Dublin). You can listen to the podcast on this page, or subscribe on iTunes.