For decades, radio telescopes have swept the sky listening for alien signals. They’ve found nothing. A new study offers a possible explanation for the lack of results, and it has nothing to do with ...

Add Yahoo as a preferred source to see more of our stories on Google. Turbulent star environments may broaden alien radio signals, making them harder for SETI to detect. (CREDIT: Shutterstock) Radio ...

High above Antarctica, a series of NASA research balloons picked up radio signals that should not exist, at least not according to the standard playbook of particle physics. The data point to ...

HoloRadar uses radio waves to see around corners, allowing it to detect people at T-shaped intersections like the one pictured here. Penn Engineers have developed a system that lets robots see around ...