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...is a weblog about the liberal arts 2.0 edited by Jason Kottke since March 1998 (archives). You can read about me and kottke.org here. If you've got questions, concerns, or interesting links, send them along.

kottke.org posts about Sean Carroll

 

Rules for time travelers

Sean Carroll lays out the rules for time travel for movies (but also more generally) based on our current understanding of physics.

1. Traveling into the future is easy. We travel into the future all the time, at a fixed rate: one second per second. Stick around, you'll be in the future soon enough. You can even get there faster than usual, by decreasing the amount of time you experience elapsing with respect to the rest of the world -- either by low-tech ways like freezing yourself, or by taking advantage of the laws of special relativity and zipping around near the speed of light. (Remember we're talking about what is possible according to the laws of physics here, not what is plausible or technologically feasible.) It's coming back that's hard.

By Jason Kottke  •  May 20, 2009  •  lists   movies   Sean Carroll   time   time travel

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