Presents adaptations of five speeches given on the occasion of the sixtieth birthday of scientist Kip Thorne, in which leading physicists, including Thorne, Stephen Hawking, Igor Novikov, Timothy Ferris, and Alan Lightman discuss different aspects of the modern physics of space and time.

Welcome to spacetime / Richard Price -- Can we change the past? / Igor Novikov -- Chronology protection: making the world safe for historians / Stephen W. Hawking -- Spacetime warps and the quantum world: speculations about the future / Kip S. Thorne -- On the popularization of science / Timothy Ferris -- The physicist as novelist / Alan Lightman.