How does a fibre-optic cable no thicker than a garden hose carry roughly 99 per cent of intercontinental internet traffic across 13,000…

The submarine cables that stitch the continents together are astonishingly slender, and astonishingly full. A single glass strand thinner than a human hair can now push more than 20 terabits a second across an entire ocean.

By How It Works · Aug 9, 2026