I love debates about whether time travel is possible. The question probably occurs most commonly in rather niche fields of science, but the question of time travel is also the frequent fodder of science fiction and philosophy. The great thing about the question is that, as of yet, no one knows whether travel to different time “destinations” is possible at-will. Certainly physicists are leaning toward the idea that traveling backward in time is impossible.

But we do know, for certain, (more…)