Now more than ever before, we have the tools to study the mysteries of consciousness. Memory, dreams, the self are now being examined using high-tech brain scans developed by physicists on the cutting edge of their field.

Dr. Michio Kaku, professor at the City College of New York, is among them. In The Future of the Mind, he gives readers a look at some of the most astonishing research in neuroscience today, and presents a vision of what future innovation might bring. NPR's Arun Rath speaks with Kaku about the advances in technology and our understanding of human consciousness.

To read more and listen to the audio, click here.