Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. By Bishop Sand March 20 at 8:00 a.m. Listen to a dawn chorus from ...

Current sleep staging practice consists of visual analysis of 30-second segments of raw EEG wave forms (top) and subjective categorization into sleep stages to create a hypnogram (middle), which is ...

An example of a spectrogram, which scientists use to highlight sound sources based on their visual signatures. Credit must be given to the creator. Only noncommercial uses of the work are permitted.

The spacecraft studying the giant planet picks up some wave signals, and NASA slows them to a frequency humans can hear. Eric Mack has been a CNET contributor since 2011. Eric and his family live 100% ...