News tagged with radio signals

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Laser cloaking device could help us hide from aliens

Two astronomers at Columbia University in New York suggest humanity could use lasers to conceal the Earth from searches by advanced extraterrestrial civilisations. Professor David Kipping and graduate student Alex Teachey ...

dateMar 31, 2016 in Astronomy
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'Seismic alert!': Apps warn Mexicans of quakes

A powerful earthquake strikes off the Pacific coast of Mexico. Within seconds, radio transmissions, megaphones and smartphone apps blare warnings to the capital's 20 million people before the ground shakes.

dateSep 19, 2015 in Software
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