There’s an old saying that the sun knows when to rise because the roosters crow to tell it. The sound of a rooster crowing has symbolized the crack of dawn for centuries. Cultures all over the world ...

Circadian rhythms tell fowl to crow at dawn, even if the birds can't see the sun come up. Sophie Bushwick reports Roosters greet the rising sun with [crowing sound effect]. But they also crow at other ...