Lice-Hunting Underwater Drone Protects Salmon With Lasers

A laser-wielding robot will help salmon farmers shoot their way out of the problem

4 min read
Gif: Stingray Marine Solutions/IEEE Spectrum

/image/Mjg3NzA5Ng.jpegA Fjord’s Friend: Aquaculture pens like these in Iceland, breed fish, but also the sea lice that feed off them.Photo: Jerzy Strzelecki

The pens holding cold-water fish in the fjords of Norway and quiet lochs of Scotland, whose depths are normally inky black after dark, now have an eerie night glow. There’s a perfectly rational explanation: Thousands of laser pulses are doing an important job, lighting up fish stocks in the latest bid to control a pesky parasite that can injure or even kill farmed salmon, and devastate an industry estimated to reel in about US $10 billion annually.

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The Transistor of 2047: Expert Predictions

What will the device be like on its 100th anniversary?

4 min read
Six men and a woman smiling.

The luminaries who dared predict the future of the transistor for IEEE Spectrum include: [clockwise from left] Gabriel Loh, Sri Samavedam, Sayeef Salahuddin, Richard Schultz, Suman Datta, Tsu-Jae King Liu, and H.-S. Philip Wong.

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The 100th anniversary of the invention of the transistor will happen in 2047. What will transistors be like then? Will they even be the critical computing element they are today? IEEE Spectrum asked experts from around the world for their predictions.

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