Maravilhas Modernas - Cabo transatlântico

Summary

Key Points

• —Submarine cables are crucial for global communication, transmitting voice and data more reliably and cheaply than satellites, with over 320 active cables carrying billions of minutes of traffic annually. 1:21
• —Early attempts to lay telegraph cables underwater were hindered by the inability to waterproof and insulate them, a problem solved by the discovery and use of gutta-percha. 2:07
• —Cyrus Field, a prominent 19th-century American, spearheaded the monumental effort to lay the first transatlantic telegraph cable, facing numerous technical setbacks and financial challenges. 3:35
• —The first successful transatlantic telegraph cable was laid in 1858, connecting North America and Europe, but it failed after only a month due to electrical issues, leading to public disappointment and criticism of Field. 24:03
• —Field's initial attempts in 1857 and 1858 to lay the transatlantic cable ended in failure due to cable breaks, despite significant investment and effort. 24:59
• —Despite the failure and the looming US Civil War, Field persevered, raising capital and using the larger ship 'Great Eastern' for subsequent attempts. 24:59
• —In 1865, another attempt to lay the cable failed near the end of the process, but in 1866, the Great Eastern successfully laid a new cable and even retrieved and completed the previous year's broken cable, establishing a permanent link. 31:11
• —The advent of the telephone and later radio technology initially challenged the dominance of telegraph cables, but the need for reliable long-distance communication eventually led to the development of amplified telephone cables. 36:52
• —The first transatlantic telephone cable, TAT1, was laid in 1956, marking a significant advancement in real-time voice communication across the ocean. 40:51
• —Modern fiber optic cables, which transmit data using light pulses, have revolutionized submarine communication, offering vastly increased bandwidth, reliability, and security compared to older technologies and satellites. 43:29