WEll you gonna get infracted you can't post about being an ally to us

Serious topic:

Is travelling through time possible?
For me it's not possible because there's paradoxes that blow your mind like:
If you travel to the epoch of your grandad and kill him, when you come back you shoulnd't be alive because you killed your grandad.
Also this one
ONTOLOGICAL PARADOX: Also known as the “Bootstraps Paradox,” an ontological paradox arises when a person or object is sent through time and recovered by another person, whose actions then lead to the original person or object back to the time from when it came in the first place, thus creating an endless loop with no discernible point of origin.