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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/

  • leftzero@lemmynsfw.com
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    4 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.