A sold-out soccer game in San Diego becomes a metaphor for American unity when the crowd's collective singing of the national ...

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For decades, a dominant theory about why birds sing at dawn — called the "dawn chorus" — has been that they can be heard farther and more clearly at that time. Sound travels faster in humid air and it ...

For decades, a dominant theory about why birds sing at dawn — called the "dawn chorus" — has been that they can be heard farther and more clearly at that time.

For decades, a dominant theory about why birds sing at dawn — called the "dawn chorus" — has been that they can be heard farther and more clearly at that time. Sound travels faster in humid air and it ...

Researchers have some new evidence about what makes birds make so much noise early in the morning, and it's not for some of the reasons they previously thought. For decades, a dominant theory about ...