this post was submitted on 23 Aug 2024
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xkcd

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Many a hungry time traveler has Googled 'trilobites shellfish allergy' only to find their carrier had no coverage in the Ordovician.

https://explainxkcd.com/2976/

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[–] leftzero@lemmynsfw.com 3 points 2 months ago

A time machine is a faster than light drive.

Well, the other way 'round, really, but same difference.

And to come back you need a slower than (but very close to) light drive.