In 2008, after falling into a deep coma, academic neurosurgeon Eben Alexander had a near-death experience that defied his understanding of how the brain works. For him, it was proof of heaven, which became the name of his New York Times–bestselling memoir. Since then, he’s been exploring the science of consciousness, connection, and spirituality with Karen Newell, an innovator in sound meditation. Together, they share how they’ve learned to tap into a higher consciousness, the existing evidence of a spiritual universe, and why they think we’re on the verge of the greatest shift in human thought.