Kip S Thorne

"The world-famous cosmologist and #1 bestselling author of A Brief History of Time leaves us with his final thoughts on the biggest questions facing humankind. Stephen Hawking was the most renowned scientist since Einstein, known both for his groundbreaking work in physics and cosmology and for his mischievous sense of humor. He educated millions of readers about the origins of the universe and the nature of black holes, and inspired millions more...

Carl Sagan and Kip Thorne postulate how time travel might one day be possible if an advanced civilization were able to harness and manipulate theoretical tunnels through space and time known as "wormholes."