Happiness Lab is five years old. To mark our birthday, Dr Laurie has picked her favorite five episodes from the archive. The show Why Nostalgia Ain't So Rosy was certainly a memorable one for her.  

Actor Rob Lowe LOVES the 1980s. And who can blame him? He was one of the most famous men on the planet. But, as he tells Dr Laurie, he's careful not to wallow in nostalgia for the music, fashions and events of his youth too much - and happiness science backs him up on this.

Research suggests that our memories of the past can be very selective and highly unreliable - causing us to misremember events and cast them in a rosy glow. Sadly, this also causes us to make very bad decisions about what will make us happy in the future.