A rising star in theoretical physics offers his awesome vision of our universe and beyond, all beginning with a simple question: Why does time move forward?

Time, experience, and the universe. The past is present memory ; The heavy hand of entropy ; The beginning and end of time -- Time in Einstein's universe. Time is personal ; Time is flexible ; Looping through time -- Entropy and time's arrow. Running time backward ; Entropy and disorder ; Information and life ; Recurrent nightmares ; Quantum time -- From the kitchen to the multiverse. Black holes : the ends of time ; The life of the universe ; Inflation and the multiverse ; The past through tomorrow ; Epilogue -- Appendix. Math.