How bringing back lost species revives ecosystems

Scientists often study the grim impacts of losing wildlife to hunting, habitat destruction and climate change. But what happens when endangered animals are brought back from the brink?

Social connection drives learning in bird brain

Juvenile zebra finches learn songs directly from a tutor—usually their father—through a social interaction that keeps them motivated and on-task. Young birds who simply hear the songs through a speaker, without the tutor's ...

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