If you could go back in time and change history, what would you do? Trick question, because the prevailing view of time travel is that history cannot be changed.
But wait, time travel is only science fiction... see, it gets complicated.
James Gleick, a science writer, looked into the idea of time travel and all the details that have gotten attached to the concept, in his book Time Travel: A History.
We go back in time--to 2017--and hear this interview again.
We didn't change anything (we can't, right?).