Actually, of interest Wikipedia seems to say that you wouldn't have to leave Ear...

		chrisfosterelli on Nov 23, 2017 \| parent \| context \| favorite \| on: Traveling back in time could be possible Actually, of interest Wikipedia seems to say that you wouldn't have to leave Earth at all (just bring the other half of the wormhole back), so I think you're right that it doesn't solve the grandfather paradox: https://en.wikipedia.org/wiki/Wormhole#Time_travel

Cool, seems we've reached the bottom of this one!