Thin underwater cables hold the internet. See a map of them all.
Map by TeleGeography: http://www.submarinecablemap.com/
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The internet is known to pulse through fiber optic cables and cell phone towers, but 99% of high-speed international information is transferred under the sea. How long has this been happening? Underwater cables delivering information isn't a novel idea — the first Transatlantic cable was laid in 1858—undersea cables have been around since the telegraph.
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