'Bat-sense' tech generates images from sound

By cleverly analyzing the results, the algorithm can deduce the shape, size and layout of a room, as well as pick out in the presence of objects or people. The results are displayed as a video feed which turns the echo data ...

Physicists create time-reversed optical waves

Optics researchers from The University of Queensland and Nokia Bell Labs in the US have developed a new technique to demonstrate the time reversal of optical waves, which could transform the fields of advanced biomedical ...

Festive treat for stargazers as Geminid meteors peak

Stargazers across the northern hemisphere could see as many as 70 meteors an hour this coming Sunday, as the Geminids meteor shower reaches its peak. Prospects for what should be this year's best display of meteors are particularly ...

NASA's new Mars rover will use X-rays to hunt fossils

NASA's Mars 2020 Perseverance rover has a challenging road ahead: After having to make it through the harrowing entry, descent, and landing phase of the mission on Feb. 18, 2021, it will begin searching for traces of microscopic ...

Record-breaking metalens could revolutionize optical technologies

Traditional lenses—like the ones found in eyeglasses—are bulky, heavy and only focus light across a limited number of wavelengths. A new, ultrathin metalens developed by researchers at the University of California, Berkeley, ...

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