A dense, chemical-smelling fog across the US, Canada, and UK triggered panic, respiratory symptoms, and conspiracy theories.

There have been occasional scares involving the appearance of mysterious fog, but national panics are rare. Anxieties ...

At the time, serratia marcescens and bacillus globigii bacteria were sprayed over the San Francisco Bay area to determine how ...

Over the past week, social media has been buzzing with reports of a mysterious fog that has enveloped large swathes of the United States, sparking concern that it may be part of a terrorist plot ...

The Daily Mail reports that the occurrences have eerie echoes of “Operation Sea ... One TikTokker posted footage of himself walking through the fog, claiming that it could be “chemical fog.” ...