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Can you actually travel in time? Into the future, yes, a little: clocks really do run slower when you move fast, and Einstein's equations hide some stranger possibilities too. Going back is where it gets messy, with grandfathers, loops and people bumping into themselves.
The second half turns to the stories, from the Victorian time machine to Primer, Tenet, Doctor Who and Star Trek, and why some hold together far better than others. A good one to have read before the next argument about a time-travel plot on the way home from the cinema.
What you get: a ZIP file containing the book as a PDF (180 pages) and an EPUB, so you can read it on a computer, tablet or e-reader.
Can you actually travel in time? Into the future, yes, a little: clocks really do run slower when you move fast, and Einstein's equations hide some stranger possibilities too. Going back is where it gets messy, with grandfathers, loops and people bumping into themselves.
The second half turns to the stories, from the Victorian time machine to Primer, Tenet, Doctor Who and Star Trek, and why some hold together far better than others. A good one to have read before the next argument about a time-travel plot on the way home from the cinema.
What you get: a ZIP file containing the book as a PDF (180 pages) and an EPUB, so you can read it on a computer, tablet or e-reader.