Add Yahoo as a preferred source to see more of our stories on Google. Small drones can be hard to track at night. Kevin Carter/Getty Images The recent spate of unidentified drone sightings in the U.S.

Kenya has started its first live trial of Digital Sound Broadcasting (DSB) in Nairobi, launching a 12-month pilot that it says could ease chronic congestion in the popular FM (frequency modulation) ...

The European Low Frequency Array of radio telescopes is performing Breakthrough Listen's first-ever search at megahertz radio frequencies. When you purchase through links on our site, we may earn an ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Some of this recent increase in activity may ...