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Add Yahoo as a preferred source to see more of our stories on Google. Scientists have searched the skies for alien radio signals for more than 60 years, but all they’ve heard so far is what Search for ...

Fires in high-rise residential towers are among the most dangerous emergencies that affect buildings. Evacuating hundreds of residents from tall buildings is complex, as smoke and flames can spread ...

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 concern. Some of this ...