Embed <iframe src="https://www.npr.org/player/embed/1478231/1478232" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player ...

"There was a time when ‘universe' meant ‘all there is,' " writes Greene, but soon we may have to redefine that word, along with our own meager understanding of the cosmos. A theoretical physicist and ...

pt. 1. edge of knowledge -- ch. 1. Tied up with string -- pt. 2. Dilemma of space, time, and the quanta -- ch. 2. Space, time, and the eye of the beholder -- ch. 3. Of warps and ripples -- ch. 4.

You’d think Brian Greene already had plenty to keep him busy, what with his day job as a professor of theoretical physics at Columbia University and his hobby of writing bestselling science books on ...