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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/

    • Dagwood222
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      3 months ago

      . It takes an army of time travelers working night and day to get any changes to stick.

      Changes do occur in the story. The participants talk about the ‘Change Winds’ and how people can just disappear because thier timeline has been shifted and their parents never met.