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Two Steps Toward a Terabit Internet

Nonlinear optics tricks bring terabit-per-second bandwidth within reach

3 min read

18 February 2009—The day an average telecom carrier can send 1 trillion bits (one terabit) of data per second down a single optical fiber may still be many years away. But in the lab, the single-fiber terabit threshold may well be crossed just one or two years from now, thanks to recent research.

Two groups of engineers—one from Australia and Denmark and the other from California—have independently created new optics technologies that could greatly increase the Internet’s speed limits. The key to the new technologies is nonlinear optics, in which physics allows for an optical fiber’s properties to be adjusted from moment to moment.

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How Police Exploited the Capitol Riot’s Digital Records

Forensic technology is powerful, but is it worth the privacy trade-offs?

11 min read
 Illustration of the silhouette of a person with upraised arm holding a cellphone in front of the U.S. Capitol building. Superimposed on the head is a green matrix, which represents data points used for facial recognition
Gabriel Zimmer

The group of well-dressed young men who gathered on the outskirts of Baltimore on the night of 5 January 2021 hardly looked like extremists. But the next day, prosecutors allege, they would all breach the United States Capitol during the deadly insurrection. Several would loot and destroy media equipment, and one would assault a policeman.

No strangers to protest, the men, members of the America First movement, diligently donned masks to obscure their faces. None boasted of their exploits on social media, and none of their friends or family would come forward to denounce them. But on 5 January, they made one piping hot, family-size mistake: They shared a pizza.

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