Esther Inglis-Arkell has an article about what could be resolved by time travel.
Leading to this: what would you want to resolve through time travel?
Time travel has long been used, in fiction, as a method of correcting past wrongs or stealing past riches. This usually leads to trouble. But what if all time travelers recovered from the past was scientific knowledge? Here are some science mysteries from the past that could be solved in the present.
Although there are plenty of past wrongs that I would love to see righted, the sad fact is that they generally happened to people other than me. The even sadder fact is that I, myself, might suffer if they were to be corrected. On the other side, there are plenty of problems that died out in the past, and so can’t be studied in the present. This does affect me, and a time traveler going back into the past and bringing the key to the puzzles back to the present could only make me better. Therefore, while I am skeptical about the kind of time travel that rights injustices, I can immediately think of quite a few problems that I would be all for a modern time traveler answering….
The sweating sickness, the Donner party, the Voynich manuscript author, Stonehenge, and Ranorongo, Jack the Ripper…