A New Twist That Could Speed the Internet

Photograph by Tobias Ackeborn/Getty Images

What strands of copper were to the 19th century, strands of glass are to the 21st. Since their introduction in the 1980s, fiber-optic cables have become the backbone of the digital age. The amount of data they deliver has increased a thousandfold in that time, but we’re brushing theoretical limits on fiber-optic speed.

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