Recorded flight calls reveal probable social associations between species making the nighttime trek. Here, an American Redstart streaks across the sky.

Related to our Painted Redstart but not quite as showy, this warbler is very widespread in the American tropics. Throughout its extensive range it is a bird of forests in the foothills and mountains.

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The American Culture Quiz is a weekly test of ... This week's quiz highlights great giftgiving, fine firs, cartoon classics and more. Can you get all eight questions right?

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Fans might not like Goku as a father but these dads in American cartoons will make them grateful that he's even in their lives and encourages them in his own way.

The centennial of the discovery of brain waves in humans exposes a chilling tale involving Nazis, war between Russia and Ukraine, suicide and the vicissitudes of history ...

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