It isn’t just for humans, either. Cats are known to chirp at other animals, be it fellow pet family members or neighbors. If you ever witness an auspicious meeting of neighborhood cats ...

NEW YORK — Scientists have detected cosmic waves that sound like birds chirping in an unexpected place. These bursts of plasma, called chorus waves, ripple at the same frequency as human hearing.

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 ...