[axxl]

Someone's going to make this comment when time travel is invented.

[kleiba]

Oh, it has been invented already. I specifically came back in time to make the above comment...

[aspenmayer]

We’re all living in John Titor’s world.

https://en.wikipedia.org/wiki/John_Titor

[datadeft]

Our current understanding it that you can only travel forward in time. Could you explain how to do it backward?