Why You Can't Travel Back in Time and Kill Hitler. (SLio9) io9 takes on the Hitler's Time Travel Exemption Act trope, from a classic episode of The Twilight Zone to Desmond Warzel's Wikihistory. [more inside]
It was on a Monday, April second - I was cruising in the vicinity of Betelgeuse - when a meteor no larger than a lima bean pierced the hull, shattered the drive regulator and part of the rudder, as a result of which the rocket lost all maneuverability. [more inside]
Timelines: Time Travel in Popular Film and TV is a beautiful visualization of that most favored science fiction gimmick. For a more thorough, but less pretty, view of science fiction that messes with history, there is a chronology of when 1,800 different alternate history stories deviate from our own time line. Also, a brief look at the logic of time travel in science fiction, and how it should work.
Rules for Time Travelers [Spoiler? alert.]
Just how plausable is time travel? Could you go back in time and kill your own grandfather?. Would you want to? Time travel is a popular subject for films, but do the writers work out exactly what is happening? Current opinion seems to be that time travel is only possible to the future, and is only one way, by travelling at near light speed. However despite this, time machines seem to already be on sale.