Blockchain without the internet?

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Blockchain without the internet?
Can we build a blockchain not based on the internet. If yes, can you explain in brief how they do that? And can you give an example of that blockchain? Thank you so much!


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Theoretically it is doable. Internet serves as communication channel which pretty accessible around the globe.
So if it shuts down the nodes will need to communicate somehow with one another – sms, radio, postal pigeons, human messengers – could be way slower tho.

Thank you Sasha & Blockgeeks!
So that means, if all governments want to shut down bitcoin or any other kind of blockchain, and they do it by shutting down the internet (just a hypothesis). Theoretically there will have other ways for the nodes to communicate and so remain the blockchain network? Am I correct?
Thank you so much!

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