The sound of birds chirping in a video of a man picking a wild salad and has apparently been identified as copyrighted material after being uploaded to YouTube. The company that YouTube’s software ...

Bursts of plasma, called chorus waves, ripple at the same frequency as human hearing. When converted to audio signals, their sharp notes mimic high-pitched bird calls. Researchers have captured such ...

You can barely hear the birds chirping in this YouTube video of a man picking some fresh ingredients for a wild salad, and yet that very sound has been identified as copyrighted material, belonging to ...

Chorus waves have hitherto been observed only in the near-Earth region. The so-called "chirping" waves, some of the strongest natural electromagnetic emissions in space, have been associated with ...