Shadowprophet
Truthiness
This one is just a quick blurb, me and the misses are watching the entire rocky movie marathon. But, if time travel were possible, it would probably wipe out all human life, if not all life on earth. Imagine someone from today traveling back to the 1800s and accidentally giving people coronavirus or really even a common flu from this era. Their immune systems would have literally no way to fight what for them would be a death sentence of a disease.