00:00 Internet relies on a hidden network of undersea cables
00:49 1.5 million km of undersea data wires worth billions of dollars worldwide
01:40 Dense wavelength division multiplexing (DWDM) enables faster data transmission via multiple wavelengths of light.
02:25 Undersea cable laying is prone to weather and human disruptions
03:15 Undersea cables are vulnerable to foreign interference
04:00 Ownership of undersea cables is typically by nations or groups, with America’s AT&T and China Telecom being the largest owners.
04:47 Tech giants own vast cable networks to keep growing
05:37 Fiber optics are still the future of long-distance internet
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