Frank Arntzenius, “Time Travel: Double Your Fun”:http://compass.bw.semcs.net/subject/philosophy/article_view?parent=browse&sortby=date&last_results=&browse_id=635164&article_id=phco_articles_bpl045 for “Philosophy Compass”:http://compass.bw.semcs.net/subject/philosophy/.

bq. I start off by relating the standard philosophical account of what time travel is to models of time travel that have recently been discussed by physicists. I then discuss some puzzles associated with time travel. I conclude that philosophers’ arguments against time travel are relevant when assessing the likelihood of the occurrence time travel in our world, and are relevant to the assessment whether time travel is physically possible.