Why does time appear to run in only one direction? We remember thepast- but why not the future? We can influence the future- butcould we, even theoretically, influence the past? Generations of philosophers and theologians, physicists andmathematicians have puzzles and speculated about these and the manyother questions that surround the concept of time. Recentscientific work is said to explain the directionality of time. Buttime still contains many mysteries- black holes and big bangs,asymmetries and relativities, arrows and loops - that willdoubtless continue to occupy us for centuries to come. In this impressive collection of original articles teninternationally known scholars explore and explains the nature oftime, apace and now space-time. Founded on the latest developmentsin thermodynamics, quantum theory and cosmology, their ideas willfascinate anyone interested in Einstein's theory of relativity.