99% Invisible 99% Invisible

Transatlantic Fiber-Optic Expialidocious

Jun 30, 2026 · 31m

Summary

This episode explores the history of TAT-8, the first transatlantic fiber optic cable, which revolutionized global telecommunications by proving fiber optics superior to satellites. Hosts Roman Mars and Christopher Johnson discuss the cable’s development, including humorous shark-proofing tests, and its eventual retirement. The story concludes with the labor-intensive process of recovering TAT-8 from the ocean floor for recycling, highlighting the physical infrastructure behind our digital world.

Topics discussed

Introduction to fiber optics and the TAT-8 cable History of fiber optics from novelty to telecom The satellite vs. submarine cable debate AT&T's development of the first transatlantic fiber cable Shark-proofing the cable: myths and tests Laying TAT-8 and its revolutionary capacity Why fiber optics defeated satellites for global internet Modern ownership of subsea cables by tech giants The retirement and recovery of the TAT-8 cable The grueling process of retrieving cable from the sea Recycling TAT-8 into everyday consumer goods
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