Nate Bargatze had a joke about this, where he says if he went back in time knowing everything he knows now, he doesn’t think he’d make any difference or even be able to prove it at all.
Michael Vsauce has a solution for that last part: slap bracelets with the locations of things that were lost for centuries. Whenever you end up*, the bracelet has a couple things on there that are lost and could be found.
Nate Bargatze had a joke about this, where he says if he went back in time knowing everything he knows now, he doesn’t think he’d make any difference or even be able to prove it at all.
Michael Vsauce has a solution for that last part: slap bracelets with the locations of things that were lost for centuries. Whenever you end up*, the bracelet has a couple things on there that are lost and could be found.
How to prove you’re a time traveller - The Rest Is Science (45:27)
*) In the last couple centuries at least, the further back you go, the fewer things are lost.