Excerpt : Ninety-nine percent of the world's digital communications rely on subsea cables. When they break, it could spell disaster for a whole country's internet. How do you fix a fault at the bottom of the ocean? ... There are 1.4 million km (870,000 miles) of telecommunication cables on the seafloor, covering every ocean on the planet. Laid end to end, these cables would span the diameter of the Sun, and are responsible for the transfer of 99% of all digital data. But for something so important, they are surprisingly slender – often little more than 2cm in diameter, or about the width of a hosepipe.
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