Popular culture reflects whatever piques our imagination. Think of the myriad movies and books that take viewers and readers on an imaginary journey to the past or the future (e.g., Gladiator, The Time Machine). Despite the ubiquity of time travel as a theme in cultural expression, the factors that underlie people’s preferences concerning the direction of time travel have gone unexplored. What determines whether a person would prefer to visit the (certain) past or explore the (uncertain) future? We identified three factors that markedly affect people’s preference for (hypothetical) travel to the past or the future, respectively. Those who think of themselves as courageous, those with a more conservative worldview, and—perhaps counterintuitively—those who are advanced in age prefer to travel into the future. We discuss implications of these initial results.

Is it possible for Suzy to travel back in time and kill her infant self? Vihvelin (1996) and Vranas (2009) hold that autoinfanticide is logically/metaphysically possible but physically impossible. Horacek (2005) believes that autoinfanticide has a nonzero chance of occurring and so is physically possible, but believes that autoinfanticide is metaphysically impossible. To sort out these issues, I describe six ways to commit autoinfanticide; for all six, there is a case to be made for their physical and metaphysical possibility.