A few days ago Radiolab performed a live show and this episode we're bringing you a few of the highlights. They were stories of what motivates us, our drives, our loves and losses. Producer Molly Webster tells us the story of life, near-death and what happens when your heart starts to work against you. And we visit with Dr. Oliver Sacks one last time to reflect on his life, his loves and his endless sense of wonder.

Special thanks to our musical guests, SO Percussion and Sarah Lipstate