Julius Caesar is alive. Time doesn’t exist. By 2050, making love to robots will be considered normal. If you are able to embrace ideas such as these, you will find Falk’s book to be an entertaining way to pass the, well, non-existent time. The first few chapters of the book look at the history of humanity and our ability to keep track of the ever-elusive fourth dimension. Beginning with a series of notches in bone, through our concept of the years, seasons, days and ultimately fractions of seconds. Falk then tracks through the physics of time, explaining Newton and Einstein’s insights. The most interesting part, perhaps, is the last few chapters, when Falk explorers the fuzzy future of physics, exploring the different theories in science. It is easy to read, with an interesting selection of anecdote and wacky ideas. In fact, you may have already read the book in the future.