The process of laying the cables on the ocean floor is quite impressive although not new. This concept started in as early as 1854.
‘Submarine cables are laid down by using specially-modified ships that carry the submarine cable on board and slowly lay it out on the seabed as per the cable operator gave the plans. The ships can carry with them up to 2,000km-length of cable.’ (Via Faisal Khan)
For an idea of what the internet would be like without undersea cables, visit Antarctica, the only continent without a physical connection to the net. 🙂