Suppose neuroscientists map the billions of neural circuits in the human brain....are we any closer to cracking the great existential mysteries - like meaning, purpose or happiness? Scientists, contemplatives and religious thinkers are now exploring the connections between neuroscience and contemplative practice, and creating a new science of mindfulness.
Neuroscientist Richard Davidson is a leading expert on the science of mindfulness. He's teamed up with the Dalai Lama to put Buddhist monks in brain scanners, and he's developing a new scientific model for studying emotion.
Karen Armstrong is one of the world's best-known writers on religion, but her own spiritual path hasn't been easy. She tells us why she joined a convent and then left - and how she later came to appreciate religious texts.
Susan Blackmore is a British psychologist who's written books on consciousness, memes and Zen Buddhism. She says her daily practice of meditation has revealed truths that have eluded the scientific study of consciousness.