This caught me earlier today – Will We Ever Time Travel? Scientists Say ‘No’ Based on This New Discovery: https://www.youtube.com/watch?v=8LHhpPtRMmU (around 3:58 minutes long).
My personal take on time travel is we either won’t be able to time travel or on the off-chance, we discover a way to time travel, I don’t believe we will be able to go back in the past and change events.
I know there are plenty of time travel theories out there that sound like we could go back in the past and change time, but often using some pretty bizarre explanations. I have a friend who thinks time travel is not only possible, but changes to the past wouldn’t catch up with the present, based on some theory he read somewhere.