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.

Add Yahoo as a preferred source to see more of our stories on Google. Illustration: MH370 plane on blue background with radio signals being emitted around itt Transmissions from amateur radio ...

A recent SETI Institute study suggests that space weather could blur and weaken extraterrestrial radio signals long before ...

The radio signal first started broadcasting on February 28, about 12 hours after the United States and Israel began bombing Iran. On a scratchy shortwave signal almost twice a day -- in the early ...

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(The Conversation) – The recent spate of unidentified drone sightings in the U.S., including some near sensitive locations such as airports and military installations, has caused significant public ...